Expression Controllers

Checkbox Control 

Add this expression to the item you want to control with the checkbox. Type:

if (

Then pick whip to the checkbox controller pulldown. Something similar to below will appear:

comp("Comp 2").layer("Adjustment Layer 2").effect("Box")("Checkbox")

Then add this to the end:

 > 0 ) {100} else {0}

Alternative Method (any layer with a value)

if(“PICKWHIP TO CHECKBOX” ==0) 0 else 100;