Press C, Q, X, T or Z. Hold Cmd on a Mac and those five letters copy, quit, cut, open a new tab and undo, all under the left hand. On Windows, Ctrl does four of them and Alt+F4 closes the app.
Keep your hands on the keys and off the mouse
Shortcut Sheets gives you the twenty keys worth learning in each app you use, Mac and Windows side by side, free to search and print. The guides cover the keyboards, desk gear, apps and automations that keep work on the keys.
Newest first. Shortcuts come with Mac and Windows keys and the app version they were checked on; gear and apps come with a price and who can skip them.
Superscript shortcut key options for Word, Excel, and PowerPoint on Mac and Windows help you format footnotes and formulas, with a printable cheat sheet.