⬆️ Maximize Any Window with Windows Key + Up Arrow

Press the Windows key + Up Arrow to maximize any window. Win + Down puts it back. Windows 10 & 11.
🎬 Start a PowerPoint Slide Show Instantly with F5

Press F5 to start your PowerPoint slide show from the beginning. Shift + F5 starts from the current slide. Mac: Command + Shift + Return.
📨 Send an Email Without the Mouse with Ctrl + Enter

Press Ctrl + Enter to send an email in Gmail or Outlook. Mac: Command + Return.
🔢 Check Your Word Count in Google Docs with Ctrl + Shift + C

Press Ctrl + Shift + C in Google Docs to see your word count. Mac: Command + Shift + C. Word: Ctrl + Shift + G.
𝗕 Make Text Bold Instantly with Ctrl + B

Select text and press Ctrl + B to make it bold. Press again to undo. Works in Docs, Word, Gmail and more. Mac: Command + B.
📜 Scroll a Web Page with the Space Bar

Press the Space bar to scroll a web page down one screen. Shift + Space goes back up. Any browser.
🔄 Reload Any Web Page with Ctrl + R

Press Ctrl + R (or F5) to reload a web page. Ctrl + Shift + R does a hard reload. Mac: Command + R.
👀 Preview Any File on a Mac with the Space Bar

On a Mac, select a file in Finder and press the Space bar to preview it without opening an app. Space again closes it.
⬇️ Minimize a Window on Your Mac with Command + M

Press Command + M to minimize a window to the Dock on your Mac. Click it in the Dock to bring it back.
❌ Close Any App Instantly with Alt + F4

Press Alt + F4 to close the app you’re using on Windows. It asks first if you have unsaved work. Mac: Command + Q.