Parameters which don't change the fixtures colour, don't move the fixture, and don't cut into the fixture's beam, live under the Beam attribute. Beam is therefore where controls for lenses such as Zoom and Focus live, and also other functions such as Control or Reset.
If your fixtures have a Shutter, you will have a button to allow you to Automatically create Beam palettes. This will create a "Shutter Open" and "Shutter Closed" palette for you to use. Custom Beam palettes can also be programmed, to store parameters, such as a specific beam angle for a Zoom.
If your fixtures have more than four beam parameters, tap the Beam button to page your encoders.