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.
Where to find your Dell monitor model number on its label, screen menu, Windows, box, or Dell lookup tools, then match the right mount, dock, or cable.
Monitor scaling can make text tiny or fuzzy across screens. See how to adjust Windows scale and resolution, then match settings across multiple monitors.