What You Will Learn

• Install and configure the KTool custom node in ComfyUI
• Use the Align Bar to align, size, and distribute nodes
• Create wireless Set/Get connections to declutter canvases
• Tweak image color, resize images, and extract image dimensions
• Monitor CPU/GPU/memory usage and export workflows as PNGs with embedded previews

Study Guide

Introduction: Why Mastering KTool in ComfyUI Changes Everything

If you use ComfyUI, you already know how powerful node-based workflows are for generative AI and image processing. But as your projects grow, so do the challenges: tangled cables, cluttered canvases, and the constant need to tweak and monitor everything. That’s where the KTool custom node becomes your new best friend.
This course is your full-access pass to mastering KTool,the essential toolkit for workflow clarity, resource monitoring, image color adjustment, and more in ComfyUI. We’ll break down every feature, from organizational power moves like the Align Bar and wireless Set/Get nodes, to visual finesse with color tweaking and resource insights. You’ll get practical, step-by-step guidance, actionable examples, and advanced tips to elevate your creative process from messy to masterful.
Whether you’re a ComfyUI beginner or a seasoned node wrangler, this guide will give you the tools, context, and confidence to streamline your workflows, unlock new creative possibilities, and get more done with less friction. Let’s dive in.

Installing the KTool Custom Node: Your Foundation

Before you can unlock the full power of KTool, you need to get it set up in ComfyUI. Installation is simple but foundational,don’t skip this.
Step-by-step installation:
1. Open ComfyUI and find the manager. This is your hub for managing custom nodes.
2. Navigate to the custom nodes manager. This section lists available add-ons.
3. Search for "KTool". Enter the term in the search field.
4. Click install. You may need to choose a version; stick with the recommended unless you have a reason otherwise.
5. Wait for installation to finish. You’ll see a confirmation.
6. Restart ComfyUI. The new features will appear only after restarting.
Quick tip: Always check the KTool GitHub page for documentation and updates to ensure you’re running the latest features and fixes.

Example 1: You want to streamline your workflow layout,installing KTool is your first step.
Example 2: Your team collaborates on a shared workstation. By each person installing KTool, everyone benefits from consistent workflow organization and features.

KTool Overview: The Power at Your Fingertips

KTool is not just another node. It’s a suite of workflow-enhancing tools embedded right into ComfyUI. Here’s what sets it apart:
- Visual organization: Align, space, and resize nodes with a click.
- Wireless workflow connections: Use Set and Get nodes to transmit data across your canvas without cables.
- Image manipulation: Adjust colors, exposure, and more,live.
- Resource insight: Monitor system load with a flexible, customizable window.
- Workflow export: Save, share, and archive your entire setup as PNGs with embedded previews.
- Parameter control: Use sliders and display nodes for seamless workflow adjustments.
KTool’s features are modular,you can use only what you need, or combine them for total workflow mastery.

Workflow Organization and Visual Clarity: The Align Bar

As workflows grow, node sprawl becomes inevitable. The KTool Align Bar is your answer to chaos,it brings the precision and speed of professional design tools right into ComfyUI.

The Align Bar,What It Is:
A horizontal bar at the top of your ComfyUI interface, packed with alignment and distribution icons, just like what you’d find in Photoshop or Illustrator.

Core Functions Explained:
- Align Left/Right/Top/Bottom Edges: Instantly line up selected nodes by their outermost edges. If you select three nodes and click "Align Left," all their left sides snap to the furthest left node’s edge.
- Align Horizontal/Vertical Centers: Center selected nodes along the x or y axis. For example, “Align Horizontal Center” stacks nodes vertically along a central line.
- Make Same Width/Height: Standardize the size of multiple nodes,perfect for a clean, professional look.
- Distribute Spaces: Evenly space selected nodes between the leftmost and rightmost (or topmost and bottommost) nodes. Ideal for symmetrical layouts.
- Customize Appearance: Use KTool settings to change the color of alignment icons and their background, making the interface your own.

Example 1: You’re building a workflow with five image processing nodes. They’re scattered across the canvas. Select them all, click “Align Top,” then “Distribute Horizontal Spaces”,now your workflow is neat and readable.
Example 2: You’re preparing a workflow for a presentation. By making all parameter nodes the same width and aligning their centers, you create a visually consistent, professional-looking diagram.
Best Practice: Use alignment tools before saving or sharing workflows to ensure others will find your canvas easy to understand.

Wireless Connections: Set and Get Nodes

Cables everywhere? Not anymore. The KTool Set and Get nodes introduce “wireless connections”,think of them as portals that transmit data across your canvas without visible wires.

How Set/Get Nodes Work:
- Set Node: Place this node right after the output you want to transmit. Assign it a numerical ID (like “1”).
- Get Node: Place this where you want to receive the data. Use the same ID as the Set node.
- Invisible Connection: Data moves from Set to Get, regardless of workflow distance, with no visible cable.
- Collapse to Save Space: Both nodes can be minimized, appearing as “little router antennas”,perfect for decluttering complex canvases.

Example 1: You have an image output on one side of your workflow and need to use it as input on the opposite side. Instead of dragging a cable across the entire canvas, use Set and Get nodes with the same ID.
Example 2: In a multi-step workflow with several branches, you want to pass a shared parameter (like a resized image size) to distant nodes. Set/Get nodes make this seamless and visually clean.
Best Practice: Always document your Set/Get node IDs in your workflow notes to avoid confusion, especially in large projects.
Tip: Collapse unused Set/Get nodes for maximum visual clarity.

Exporting Workflows as PNGs with Embedded Previews

KTool lets you not just save your workflow, but export it as a PNG image complete with a visual preview. This is a game-changer for sharing, archiving, and collaborating.

How Export Works:
- Right-click on the canvas.
- Navigate to KTool in the menu.
- Select “Export workflow as PNG”. Optionally, choose to include workflow information.
- PNG with Embedded Preview: The PNG contains both the screenshot and the workflow data.
- Drag-and-drop Re-import: Drag this PNG back into ComfyUI, and your workflow loads instantly, visuals and all.

Example 1: You finish a complex workflow and want to share it with a collaborator. Export as a PNG, send the file, and they can load the exact same setup,no confusion.
Example 2: You’re archiving your best workflows for future reference. PNG exports with embedded previews let you browse workflows visually before loading.
Best Practice: Use descriptive filenames and maintain an organized PNG workflow archive for quick access and version control.

Enhanced User Interface and Customisation

KTool doesn’t just add tools,it lets you personalize your workspace for efficiency and comfort.

Resource Monitor:
- Monitor Button: Click to open a system resource window showing CPU, GPU, or memory usage.
- Resizable, Movable Window: Drag and resize the monitor to fit your workspace.
- Settings Control: Enable/disable the monitor button, adjust its appearance, and choose what stats to display.
- Performance Insight: Track system load, catch bottlenecks, and optimize workflow execution.

Example 1: You’re working with high-res images and want to see if your GPU is maxed out. Keep the Resource Monitor open and adjust your workflow if bottlenecks appear.
Example 2: You’re testing multiple workflows in a row. The monitor helps you see real-time impact on system resources, so you can balance performance and quality.
Best Practice: Disable the monitor when running on systems with limited resources, or when you need more screen space.

Customisation of Alignment Icons:
- Make it Yours: In KTool settings, change the colors of align bar icons and their backgrounds.
- Boost Usability: Use high-contrast colors for better visibility, or match your personal color theme for focus and comfort.
Tip: If you work long hours, choose color schemes that reduce eye strain.

Image Manipulation and Information Extraction

KTool’s image-focused nodes bring professional-grade editing and data extraction directly into your workflow.

Color Adjustment Node:
- Sliders for Fine Control: Adjust exposure, contrast, and tint in real time.
- “Run on Change” Option: Enable this to trigger instant workflow updates as you move sliders,giving you a live preview, just like in Photoshop.
- Preview Node Integration: Connect to a preview node to see changes instantly.

Example 1: You’re refining the output of a generative image model. Use the Color Adjustment node to tweak exposure and contrast, watching the results update live in the preview.
Example 2: You want to apply a subtle blue tint to a batch of images for a consistent style. Adjust the tint slider and instantly see the effect.
Best Practice: Always use “Run on Change” for color tweaks, but remember it may increase resource usage on very large images.

Image Size Extractor Node:
- Extracts width and height from any image input.
- Outputs these values for use in other nodes.
- Ensures consistency: When you need generated images to match input images (e.g., for ControlNet), this node is essential.

Example 1: You have a reference image for a style transfer. The Image Size Extractor node outputs its dimensions, which you then feed into your image generation node to match size.
Example 2: You’re batch-processing images of different dimensions and want all outputs to standardize to each input image’s size. The extractor node automates this.
Tip: Combine with the Image Resizer node for total control over dimensions.

Image Resizer Node:
- Resize to any dimension: Set new width and height.
- Keep Ratio Option: Maintain the original aspect ratio, or override for custom sizes.
- Perfect for prepping images for specific models or output needs.

Example 1: You need all input images to be 512x512 pixels for a generative model. Use Image Resizer with “Keep Ratio” off.
Example 2: You want to enlarge images while preserving proportions. Enable “Keep Ratio” to avoid stretching.
Best Practice: Always verify the output dimensions before downstream processing to avoid unexpected results.

Integration with Workflow Values: Sliders and Display

KTool’s slider and display nodes bring interactive, dynamic parameter control to your workflows.

Slider Nodes:
- 0-10, 0-100, 0-1000 Ranges: Pick the slider that matches your input parameter’s expected range.
- Connect to Integer Inputs: Sliders work with values like steps, seed, width, height, batch size, and more.
- Collapsible Nodes: Collapse target nodes so the slider is the main control,ideal for frequently-tweaked parameters.

Example 1: You’re experimenting with batch size in a KSampler node. Add a 0-100 slider and collapse the sampler node,now you can adjust batch size instantly.
Example 2: You want to fine-tune the seed value for reproducible outputs. Use a 0-1000 slider and adjust in real time.
Tip: Use sliders for any parameter you tweak often,this saves time and reduces error.

Display Any Node:
- Universal Output Display: Show the output of any node,strings, tensors, prompts, encoded text.
- Debugging and Analysis: Instantly see what’s happening inside your workflow.

Example 1: You want to check the text prompt being encoded by a CLIP Text Encoder. Connect its output to a Display Any node.
Example 2: You’re debugging a workflow and need to see the tensor shape at a specific node. The display node reveals this instantly.
Best Practice: Use display nodes to build transparency into complex workflows,especially useful when collaborating or sharing with others.

Practical Applications: Organizing and Scaling Workflows

Let’s tie it all together with real-world examples that leverage multiple KTool features for maximum impact.

Scenario 1: Large-Scale Image Generation Pipeline
You’re creating a multi-stage workflow for generating, refining, and saving images at scale. Here’s how KTool supercharges the process:
- Use the Align Bar to organize preprocessing, generation, and postprocessing stages in clean, logical columns.
- Set/Get nodes “wirelessly” transmit intermediate images between distant workflow stages, eliminating cable clutter.
- Slider nodes control key parameters (steps, width, batch size) for rapid experimentation.
- Resource Monitor keeps system load in check as you tweak settings.
- Export the entire pipeline as a PNG with preview for easy sharing with your team.

Scenario 2: Collaborative Workflow Development
You’re working with two other creators to design a new generative art workflow.
- Each team member uses custom-colored alignment icons for their section.
- Set/Get nodes enable handoff of images and parameters between contributors’ parts.
- Everyone exports their sub-workflows as PNGs for integration and review.
- Resource Monitor ensures no one’s additions overload the shared workstation.

Scenario 3: Automated Image Matching for ControlNet
You want your generated images to always match the dimensions of a reference image.
- Use an Image Size Extractor node to pull width and height from the reference.
- Pass those values into both an Empty Latent Image node and an Image Resizer node.
- The workflow always matches ControlNet’s requirements, even if the reference changes.

Advanced Tips and Best Practices

- Document Set/Get node IDs: Use comments or a Display Any node to keep track of portal IDs in sprawling workflows.
- Batch export workflows: Maintain a versioned archive of your PNG exports for rollback and experimentation.
- Use color-coding: Assign unique colors to alignment icons for different workflow sections (e.g., preprocessing, generation, postprocessing).
- Optimize for resource usage: Monitor impact of “Run on Change” and resource-heavy nodes, adjusting workflow structure as needed.
- Collaborate visually: Clean, aligned, and labeled workflows are easier to share, debug, and improve as a team.

Anticipating Future Developments and Staying Up to Date

KTool is actively developed, and its feature set may grow. Always check the official GitHub for new documentation, bug fixes, and feature additions. As ComfyUI continues to integrate more tools natively, KTool represents the potential of custom nodes to push boundaries,stay curious and experiment with new versions as they arrive.

Conclusion: Transform Your Workflow with KTool Mastery

You’ve now seen how the KTool custom node can radically improve your ComfyUI experience, from organizing complex workflows to fine-tuning image output and keeping your system running smoothly. Whether you’re aligning nodes for clarity, using Set/Get nodes to declutter and connect, tweaking images for perfection, or exporting your entire workflow as a visually-rich PNG, KTool gives you the control and flexibility you need.
The skills and best practices covered here don’t just make your workflows prettier,they make them more efficient, easier to share, and more fun to use. As you apply these tools, you’ll spend less time fighting your interface and more time creating, refining, and collaborating.
Remember: the true power of KTool comes from understanding its features deeply and applying them thoughtfully to your unique projects. Keep experimenting, keep organizing, and keep pushing the boundaries of what’s possible in ComfyUI. The future of your creative workflow is in your hands.

Frequently Asked Questions

This FAQ section is designed to provide clear, practical answers to common questions about the ComfyUI Tutorial Series Ep 43: KayTool – Align Nodes, Tweak Image Colors, Monitor Resources. Here you'll find explanations of essential features, installation steps, workflow tips, troubleshooting advice, and advanced techniques, all aimed at helping business professionals get more value from ComfyUI and the KayTool custom node.

What is the K tool custom node for Comfy UI?

The K tool is a custom node for Comfy UI that enhances the user interface and workflow management. It offers a range of functionalities including aligning nodes, tweaking image colours, monitoring system resources, and providing tools for a more streamlined and organised workflow within Comfy UI.

How do I install the K tool custom node?

To install the K tool, open Comfy UI, go to the Manager, and then to the Custom Nodes Manager. Search for "K tool" and click "Install". Select the latest version, wait for the installation to complete, and then click "Restart" when prompted.

What alignment features does the K tool provide?

The K tool adds an alignment bar to the top of the Comfy UI interface. This bar provides options to align selected nodes by their left edges, right edges, or horizontal centres. It also allows vertical alignment by top edges, bottom edges, or vertical centres. Additionally, it can make selected nodes the same width or height and distribute the space between them horizontally.

How does the resource monitor work in the K tool?

The K tool includes a resource monitor that can be accessed by clicking a dedicated "Monitor" button. This opens a window that displays system resource usage. The monitor can be resized and repositioned. You can also enable or disable the monitor button and customise its appearance through the K tool settings.

Can I export my Comfy UI workflow using the K tool?

Yes, the K tool allows you to export your workflow as a PNG image. By right-clicking on the canvas and selecting "K tool" > "Export workflow as PNG", you can choose to include workflow information, which saves a screenshot of your workflow along with the workflow data embedded in the image. This image can then be dragged back into Comfy UI to load the workflow.

How do the Set and Get nodes in the K tool facilitate wireless connections?

The Set and Get nodes work in pairs to create wireless connections between nodes. You connect an output from one node (e.g., an image, model, or latent) to a "Set" node and assign it an ID (like a portal number). On another part of your workflow, you add a "Get" node with the same ID. The data connected to the "Set" node with that ID will then be available wirelessly at the "Get" node with the same ID, eliminating the need for a physical cable.

What image manipulation capabilities does the K tool offer?

The K tool provides a "Color Adjustment" node that allows for real-time image colour manipulation. By enabling the "run on change" option for quick workflows, you can adjust sliders for exposure, contrast, tint, and temperature and see the changes applied to a preview image instantly. The node also includes predefined style filters for applying various colour variations to images. Other image nodes include "Image Size Extractor" and "Image Resizer".

What are some other useful nodes included in the K tool?

Beyond alignment and image adjustments, the K tool offers nodes like sliders that can control numerical inputs in other nodes (like steps, seed, width, or height). It also has a "Display Any" node that can display information from various node outputs, similar to a debugging or monitoring tool. The K tool's GitHub page, accessible through the Comfy UI Manager, lists and describes more of its nodes.

What are the primary functions of the KTool custom node in Comfy UI?

The KTool custom node is designed to make workflows more efficient and visually organized. Its core features include node alignment, live image color adjustments, resource monitoring, wireless node connections, convenient node minimization, and workflow export. These tools reduce manual steps, improve clarity, and help you work faster and more effectively.

How does the KTool resource monitor help manage system performance?

The resource monitor gives you real-time feedback about your system’s CPU, GPU, and memory usage. This is essential when running intensive workflows, as it helps you avoid overloads or crashes. For business users running batch jobs or large models, monitoring system health ensures smoother operation and lets you adjust workflow complexity as needed.

How can I export a workflow with a preview using KTool?

Right-click on the workflow canvas, choose "K tool," and select "Export workflow as PNG." You’ll have the option to include both a screenshot and the workflow data. The exported PNG file can later be dragged back into Comfy UI, reloading your entire setup,including notes and node positions,with a single step. This is ideal for sharing or archiving workflows.

What is the difference between aligning edges and aligning centers in KTool?

Aligning edges lines up the outer boundaries of nodes (left, right, top, or bottom), while aligning centers matches their central points. For example, left-edge alignment places all selected nodes so their left sides are in the same position. Center alignment, on the other hand, lines up nodes so their centers are vertically or horizontally aligned, resulting in a tidy, balanced appearance.

What does the "Distribute spaces" function do in the KTool align bar?

The "Distribute spaces" feature evenly spaces selected nodes between the far left and far right (or top and bottom) nodes. This ensures uniform gaps between nodes, improving visual consistency. It’s useful for organizing complex workflows or presentations where clarity and structure matter.

What types of values can be controlled using the KTool slider nodes?

KTool slider nodes are designed to control integer values in other nodes. Typical use cases include adjusting steps, seed, width, height, or batch size. By linking a slider to these parameters, you can fine-tune workflow settings quickly without typing values manually.

How does the "Color adjustment" node in KTool provide a live preview of image edits?

When you enable the "Run on change" option for the Color Adjustment node, any slider movement automatically reruns the workflow and updates the image preview. This allows you to instantly see the impact of exposure, contrast, tint, or temperature changes, making image refinement faster and more intuitive.

What is the function of the "Image size extractor" node?

The Image Size Extractor node takes an image input and outputs its width and height as separate values. This is useful for dynamically setting dimensions in other nodes, such as the Image Resizer or Empty Latent Image node, helping to maintain consistency in image sizes throughout your workflow.

How can KTool improve workflow organization and efficiency?

KTool provides alignment tools, node minimization, and wireless connections that help declutter and streamline your canvas. For example, aligning nodes reduces visual chaos, while minimizing nodes hides unnecessary details. Wireless Set/Get nodes eliminate tangled cables, making even complex workflows easier to manage and understand. This results in faster editing, easier collaboration, and fewer mistakes.

What are the practical benefits of using wireless Set and Get nodes in complex workflows?

Set and Get nodes reduce visual clutter by replacing long, crossing cables with wireless connections. In a large workflow, this makes the canvas easier to read, debug, and modify. For example, you can send an image from one corner of your workflow directly to another without dragging a cable across everything in between, improving both clarity and workflow speed.

Are there any drawbacks to using Set and Get nodes instead of traditional cables?

The main challenge with Set and Get nodes is tracking which IDs are used and where connections are made. If IDs are not named or documented clearly, it can be difficult to troubleshoot or hand off workflows to others. To avoid confusion, use a consistent naming or numbering system and document your workflow structure where possible.

How can I keep image dimensions consistent across my workflow with KTool?

The Image Size Extractor and Image Resizer nodes work together to maintain consistent image dimensions. For example, you can extract the dimensions of an input image and feed those values into the Image Resizer node for subsequent images. This is especially useful in batch processing or when combining multiple image sources in a single pipeline.

What practical applications does the KTool Color Adjustment node have?

The Color Adjustment node enables precise, real-time tuning of image properties for branding, marketing, or product visuals. For example, a business can quickly standardize image color profiles for a campaign or fine-tune visuals for a website, ensuring consistency and quality without round-tripping to external photo editors.

How do I customize the resource monitor appearance in KTool?

KTool’s resource monitor settings let you adjust its size, position, and visibility directly within the interface. You can move the monitor window to a convenient location, resize it to fit your workspace, and toggle its display on or off, allowing for a personalized dashboard that fits your workflow needs.

Can I use KTool to debug or analyze node outputs?

Yes, the "Display Any" node in KTool can display strings, numbers, or tensor shapes from connected nodes. This is especially helpful when troubleshooting a workflow or verifying that data is flowing as expected, reducing time spent searching for issues.

How do I control multiple parameters simultaneously using KTool?

KTool allows you to use multiple slider nodes, each mapped to a different parameter (such as steps, batch size, or width). This makes it easy to adjust several values at once, experiment with settings, and optimize results in real time, all from a central control panel.

Can I reuse or share my workflows with other users using KTool?

Workflows exported as PNG files via KTool can be shared, archived, and re-imported by anyone with Comfy UI and the KTool installed. All node positions, connections, and even notes are preserved, making it straightforward to collaborate or build a library of reusable templates.

What should I do if my custom node does not appear after installing KTool?

First, ensure that you restarted Comfy UI after installing KTool. If the node still doesn't appear, check for installation errors in the console or manager log. It may help to update Comfy UI, check network connections, or reinstall the KTool node. Confirm that you’re using a compatible version, and consult the KTool GitHub page for troubleshooting tips.

How can I minimize or collapse nodes to reduce visual clutter with KTool?

Most nodes in Comfy UI, including KTool nodes, have a collapse/minimize button in the corner. Click this to shrink the node, hiding less-used inputs and outputs. This is especially helpful in large workflows, making it easier to focus on active areas without deleting any connections.

How do I update or remove the KTool custom node?

Use the Custom Nodes Manager in Comfy UI to find KTool. If an update is available, you’ll see an option to update; click it and restart Comfy UI. To remove KTool, select it in the manager and click "Uninstall," then restart the application to complete the process.

Can I control the aspect ratio when resizing images with KTool?

Yes, the Image Resizer node includes a "Keep Ratio" option. Enabling this maintains the original aspect ratio of the input image, preventing distortion when resizing for thumbnails, social media, or web content.

Is KTool suitable for business environments and team collaboration?

KTool is well-suited for business use, offering features like workflow export, node organization, and resource monitoring. Teams can standardize processes, share templates, and monitor resource usage to optimize productivity and consistency across projects.

How can I find documentation or support for KTool?

Access the KTool GitHub page directly from the Comfy UI Manager for documentation, issue tracking, and updates. The GitHub page often features installation guides, node descriptions, and a community Q&A section for troubleshooting or feature requests.

What types of data can be sent wirelessly using Set and Get nodes?

Set and Get nodes can transmit images, latent data, models, and other compatible node outputs wirelessly across your workflow. This flexibility helps structure complex pipelines, such as sending generated images to multiple processing streams or aggregating results from different sources.

Can I use KTool to automate parts of my workflow?

By combining "Run on change" with slider nodes and wireless connections, you can create semi-automated workflows that react to parameter adjustments or data inputs. This approach is valuable for rapid prototyping or iterative testing, where immediate feedback and fast adjustments are required.

How do I troubleshoot errors related to KTool nodes?

Check the node inputs and parameters for compatibility, review the Comfy UI log for error messages, and consult the KTool GitHub issues page. Common issues include mismatched data types, missing dependencies, or version conflicts. Updating both Comfy UI and KTool often resolves compatibility problems.

What should I consider when designing workflows for team use with KTool?

Use clear naming conventions, document Set/Get node IDs, and export workflows as PNGs with notes for context. This makes it easier for others to understand, modify, and troubleshoot your workflows, reducing onboarding time and minimizing errors in collaborative projects.

Are there any performance considerations when using multiple KTool features?

Enabling multiple live previews, resource monitors, or large-scale node arrangements can increase system load. Monitor resource usage, and if you notice slowdowns, consider reducing live updates or collapsing unused nodes to optimize performance without sacrificing workflow clarity.

How can I use KTool in business settings for image generation or automation?

KTool’s automation, alignment, and export features are ideal for batch image processing, marketing campaigns, and rapid prototyping. For example, a design team can set up standardized workflows for generating branded visuals, adjust parameters on the fly, and export complete workflows for review or reuse by other departments.

What are some common misconceptions about KTool functionality?

Some users assume KTool only helps with node alignment, but it also offers advanced features like live color adjustment, resource monitoring, and wireless connections. Others think it replaces all standard nodes, but KTool is intended to complement and enhance the existing Comfy UI toolkit, not replace it.