Set Effect Masks

After Effects script that sets the currently selected mask/s to the currently selected effect/s. If a selected mask is already set as an effect mask to the effect, it will be removed from the effect. Adding/removing effect masks this way is quicker than always having to twirl the Compositing Options of every effect open and selecting the mask via the dropdown.

The script goes into After Effects' 'Scripts' folder (not 'ScriptUI Panels' folder). Now, you can set a keyboard shortcut for the script in After Effects' shortcuts panel, or you can link to it via KBar.