DocsConnections

Node Connections

Creating and managing type-safe data flow links between nodes in the Node Editor.

Overview

Connections represent data flow between nodes. Each connection:

Type-Safe: Only compatible pin types can connect
Directional: Data flows from output to input pins
Validated: Automatic shape and type checking
Visual: Color-coded by data type

Pin Types

Type	Color	Purpose
Tensor	Blue	General tensor data
Labels	Green	Classification labels
Parameters	Orange	Model parameters
Loss	Red	Loss values
Optimizer	Purple	Optimizer state
Dataset	Cyan	Dataset reference

Creating Connections

Click on an output pin (right side of node)
Drag the connection line to a target input pin
Release over a compatible input pin (left side of node)
Connection snaps into place if types are compatible

Tip: You can also drag from input to output pins.

Connection Flow

+------------+          +------------+          +------------+
|  DataInput |          |   Dense    |          |   ReLU     |
|            |          |            |          |            |
|        [o]-+--------->+-[o]    [o]-+--------->+-[o]    [o]-+---->
|   output   |  Tensor  |  input out |  Tensor  |  input out |
+------------+          +------------+          +------------+

   [o] = Pin (colored by type)
   --> = Connection (data flow direction)

Managing Connections

Delete Connection

Click on connection line to select
Press Delete or Backspace
Or right-click connection → Delete

Reroute Connection

Double-click on connection to add reroute point
Drag reroute point to organize layout
Double-click reroute point to remove

Disconnect All

Right-click on a node → Disconnect All to remove all connections from that node.

Replace Connection

Drag a new connection to an already-connected input pin to replace the existing connection.

Multiple Connections

Output Pins

Can connect to multiple inputs (fan-out). Data is copied to each connected node.

Input Pins

Accept only one connection (unless it's a merge node like Concatenate or Add).

Connection Errors

Error	Cause	Solution
Invalid connection	Incompatible pin types	Check pin colors match
Cycle detected	Circular connection	Use skip connections properly
Shape mismatch	Tensor dimensions don't match	Add Reshape or check layer config
Missing input	Required pin not connected	Connect all required inputs

Keyboard Shortcuts

Action	Shortcut
Delete selected connection	Delete
Select all connections	Ctrl+A
Undo connection change	Ctrl+Z