To close all windows of the app, press Option-Command-W. Command-O: Open the selected item, or open a dialogue to select a file to open.To minimise all windows of the front app, press Option-Command-M. Command-M: Minimise the front window to the Dock.To view the front app but hide all other apps, press Option-Command-H. Command-H: Hide the windows of the front app.To find the previous occurrence, press Shift-Command-G. Command-G: Find Again: Find the next occurrence of the item previously found.Command-F: Find items in a document or open a Find window.
In some apps, you can undo and redo multiple commands. You can then press Shift-Command-Z to Redo, reversing the undo command.
