Using a Checkbox Control
A Checkbox Control works a lot like a true or false statement: 0 if false and 1 if true. So in the case of your scene, a “0” will represent a checkbox not selected, and a “1” will be a checkbox selected.
The Checkbox Control cannot simply be pickwhipped to the expression controller. You need to take it one step further. In order to use the Checkbox Control you will need to use the small expression: