How listen or change the tool option , like brush size etc?

Photoshop
1

i use alchemist but it can’t listen
image

2

Hi, make sure you have the Listener button on, and Descriptors, Listener options activated. See screensht below. Brush sized changed.

Screenshot 2021-02-07 at 16.04.17
Screenshot 2021-02-07 at 16.04.171522×1176 132 KB

3

I just posted an example for that … check it out. This one specifically sets the minimum opacity, but you can easily set any other variable like brush size etc.