Node Operations

Learn how to add, connect, and manage nodes in ComfyUI.

Adding Nodes

Method 1: Double-click Canvas

1. Double-click empty area on canvas
2. Type node name (e.g., "Checkpoint")
3. Select from dropdown results

Method 2: Right-click Menu

1. Right-click on canvas
2. Select "Add Node"
3. Browse categories
4. Click to add

Method 3: Search Box

Press Ctrl+Space or click search icon:

1. Type node name
2. Select from results
3. Node appears on canvas

Node Categories

Model Loading

Node	Description
CheckpointLoader	Load SD model
CheckpointLoaderSDXL	Load SDXL model
VAELoader	Load VAE model
LoraLoader	Load LoRA model

Sampling

Node	Description
KSampler	Main sampler
KSamplerAdvanced	Advanced sampler with more options
SamplerCustom	Custom sampling

Image Operations

Node	Description
LoadImage	Load image file
SaveImage	Save image
ImageScale	Scale image
ImagePad	Pad image

Connecting Nodes

Connection Rules

Output Type	Compatible Input
MODEL	Model input (KSampler)
CLIP	CLIP input (TextEncode)
LATENT	Latent input (KSampler, VAE)
IMAGE	Image input (VAEEncode, SaveImage)

Connect Steps

1. Click output port (bottom circle)
2. Drag to input port (top circle)
3. Release to connect
4. Connection changes color based on type

Connection Colors

Color	Type
Orange	Model
Blue	CLIP
Green	Latent
Gray	Image

Disconnect

Click on connection line and press Delete, or drag connection away.

Node Properties

Click Node

Single click to select node.

Open Properties

Double-click node or right-click → Properties.

Common Properties

Property	Description
Seed	Random seed for generation
Steps	Sampling steps
CFG	Guidance scale
Width/Height	Output dimensions

Moving and Arranging

Move Node

Click and drag node to move.

Multi-select

• Shift+Click: Add to selection
• Ctrl+Click: Toggle selection
• Ctrl+A: Select all
• Drag to create selection box

Align Nodes

Right-click → Align → Select alignment type.

Grouping

Create Group

1. Select multiple nodes
2. Right-click → Group
3. Name the group

Group Operations

Operation	Description
Minimize	Collapse group
Color	Set group color
Title	Set group title

Searching Nodes

Quick Search

Press Ctrl+F:

1. Type node name
2. Results appear instantly
3. Click to add

Filter by Category

popular:        # Popular nodes
model:          # Model loading
sampler:        # Sampling nodes
image:          # Image operations

Deleting Nodes

Method	Action
Keyboard	Select + Delete
Context Menu	Right-click → Delete
Disconnect	Remove all connections first

Copy and Paste

Copy

Ctrl+C: Copy selected nodes

Paste

Ctrl+V: Paste nodes (offset position)

Duplicate

Ctrl+D: Duplicate selected nodes

Node Colors

Color Coding

Color	Meaning
Default	Normal node
Green	Input (source)
Red	Output (destination)
Yellow	Selected

Custom Colors

Right-click → Color → Select color.

Troubleshooting

Q: Cannot connect nodes

A: Check if port types are compatible. Connection will only form between compatible types.

Q: Node not found in search

A: Type more characters or check spelling. Some nodes require custom installation.

Q: Node disappeared

A: Use Ctrl+F to search. Check if accidentally deleted.

Next Steps

• Interface Basic - Interface overview
• CheckpointLoader - Node details