Hide excluded folders from tree in IntelliJ IDEA
The answer is close, in the Project gear menu:
PS: Yes, it's a self-learning post
Also, you may have switched on the Show Excluded Files option. If so, use Shift + Shift and type excluded and do the obvious thing.
Right click at the directory you want to exclude to mark it as excluded,
,
and then uncheck the Show Excluded Files option.
1: Intellij IDEA > Preferences.
2: Go to File Types.
3: Add *.iml and *.idea to the Ignore files and folders list box at the bottom of this window.