The wide rectangles indicate the channels the node processes.

The thin rectangles indicate the channels that are passed through the node untouched.

The node’s effect is limited by a mask from either the node’s primary input or output.

The node has been disabled by pressing D or clicking the Disable button.

The node has been disabled using an expression.

The node has been cloned. The indicator appears on both the parent and the child node.

One or more of the node parameters are animated over time.

One or more of the node parameters are being driven by an expression.

You are working with a multi-view project and have split off one or more views in the node’s controls.

You are working with a multi-view project and have split off one or more views in the node’s controls, dots also appear on the node to indicate which views have been split off. For example, if you are using red for the left view and split off that view, a red dot appears on the node.