Range Selector /Advanced/Mode question

[bogdand55626760]

Hello friends, I ran into a problem
I want the parameter Range Selector /Advanced/Mode switching using the checkbox controller
For example, if the check box is off, value Add
If the check box is on, value Substract

Please respond, knowledgeable friends! I am very bad at expressions
Chat GPT does not know anything about this))

effect("Reverse Direction")("Checkbox") == 1 ? 1 : 0;

this code doesn't work
Thanks in advance!

[bogdand55626760]

Here is a screenshot

[Rick Gerard]

In my experience, using Chat GBT to help or create expressions for After Effects has a success rate of about 10%.

Numbers, not names, drive menus like the Range Selector/Advanced/Mode. The numbers start from 1, not zero.

The easiest way to understand what is going on is to use an if/else statement:

ctrl = effect("Checkbox Control")("Checkbox");
if (ctrl == 0)
	1;
else
	2;

Without an if statement, the expression would look like this:

ctrl = effect("Checkbox Control")("Checkbox");
ctrl == 0 ? 1 : 2;

Setting up an Effect/Expression Control as a variable is always a good idea. The ctrl checkbox switch starts at 0 for not selected, then goes to 1.