Reply To: Always save when closing any preexisting file without a prompt

I think you are seeking the “Save and Close” command.
For more convenience, you can:
– Give it a shortcut key;
– Make a toolbar button for it; (The default macros are good examples.)
– Put it into a menu.

By the way, use “Keyboard Map” (e.g. type “close save” in it) and you can find more by yourself.