Customizing Nuke with Gizmos - Nuke 101: Professional Compositing and Visual Effects - page 495

4. Insert a Crop node by clicking Rectangle1 and inserting the Crop from the Trans-
form toolbox.
The lines are there, but you can't see them very well because of Rectangle1's on-
screen controls.
5. Clear the Properties Bin and look at the Viewer ( FIGURE 12.3 ) .
Figure 12.3. The outline you will use for the Action Safe guide.
Start changing the size of Rectangle1. As mentioned, the size of the rectangle is
expressed as a percentage of the source image resolution. The percentage is de-
termined by the user, and the image will be the input image (whatever it will be).
Let's add an expression to Rectangle1's Area property. This property has four In-
put fields for the location of each side of the rectangle (measured in pixels). You
wanttobeable tocontrol thelocation asaderivative oftheresolution, soyouuse
the expressions “width” and “height” again.
6. Double-click Rectangle1 to load its Properties panel into the Properties Bin.