Exclude folder from search but not from the project list

Question

I have a few different project with the same core.

All I need is to mark all not current projects as excluded to avoid searching through them (

Answer 1

To apply custom search use Scopes Settings/Preferences > Appearance & Behavior > Scopes to use it for Find in Path or Replace in Path.
I suggest to reorganize your folders, so that no unnecessary files are left in project directory. Also, you can specify Source Root by going to Settings > Project Settings > Directories and adding additional directories.