To delete a connection between nodes in the Node Editor
- Do any of the following:
- Click on a connection line, drag away to break the connection, then release to delete.
- Select the connection line(s) you want to delete (marquee-select to select more than one), then press Backspace or (Mac OS X) Delete.
-
+ 
+ drag to draw a line across all connections you want to delete. (Release to delete all connections crossed by the line.)
The connection lines are deleted and the swatches in the Node Editor update to show the changes.