Personal-Bookmarks:: Press ⇧⌘/ to search all of the current app's menu items. Then use the Up/Down arrow keys to navigate the results and press Return to execute that menu bar action. Hold Option while resizing a window to resize from the center of the window. Hold Shift while resizing a window to lock the aspect ratio. When a window is inactive, use the Command key to interact with it without making it active. If an…
This is the one feature I miss most from using macos. I got used to it back when Ubuntu used unity as its DE and called it "HUD". Didn't work everywhere (looking at you, java), but a huge timesaver.