[nshntarora]

Option + Click

And

Command + Option + Shift + Click

Works on most default OS things you can click on. Reveals a whole new set of amazing functionality.

Example: Doing so on the bluetooth icon on your menu bar, gives you the debug option for you to reset / restart bluetooth module.

[ja27]

Yes. My newest find is that you can option-click on the scaling options in Display prefs and sometimes get more choices.