Customizing Nuke with Gizmos - Nuke 101: Professional Compositing and Visual Effects - page 498

to change each of the four expressions to have a 7 instead of a 5. This can be un-
intuitive and quite annoying. There is another, better, way: Create a User Knob.
Creating User Knobs
You need to create a property for the percentage value so that you and any other user of
your Gizmo will have something easy to manipulate. Nuke lets you create user properties
called User Knobs . Now you'll make another node to hold your User Knobs.
1. Create a NoOp node from the Other toolbox.
Note
TheNoOpnodeisexactly whatitsaysitis:Ithasnoinitial function-
ality. You can use it for various things, but mainly you will use it for
the kind of task shown here.
2. Right-click (Ctrl-click) somewhere in NoOp1's Properties panel. From the con-
textual menu click Manage User Knobs ( FIGURE 12.8 ) .
Figure 12.8. Accessing the User Knobs panel.
As mentioned, a knob is just another name for a property. Managing User Knobs
means to manage the user-generated knobs. This loads the User Knobs panel for
this node ( FIGURE 12.9 ).
Figure 12.9. The User Knobs panel.