value * effect("Control Name")("Checkbox"); // replace Checkbox Control with your checkbox control
β
thisComp.layer("Controls").effect("Control Name")("Checkbox") * value;
Generate a random number
Make the anchor point always vertically centered on a text layer
Apply this expression to the property you want to control (like opacity) and make sure it is referencing the correct control layer.
Get Β After Effects tips & tricksdelivered to your inbox