Touring the Interface with a Basic Composite - Nuke 101: Professional Compositing and Visual Effects - page 51

• To move a pipe from one node to another, click the end you want to connect (input
or output) and drag it to the node you want to connect it to ( FIGURE 2.19 ) .
Figure 2.19. Grabbing the output part of the pipe.
• To branch an existing output to an existing node, Shift-click the existing outgoing
pipe and drag the newly created pipe to the existing node ( FIGURE 2.20 ) .
Figure 2.20. Holding Shift and dragging the input end of the pipe.