OS X keyboard short-cut
Command + Up Arrow — Immediately scroll to the top of any webpage.
Command + Down Arrow — Immediately scroll to the bottom of any webpage.
Command + Semicolon — Cycle through misspelled words in any given document.
Command + 1 (2, 3) — Use this shortcut to conveniently cycle through any open tabs you have in your browser. Command + 1 will take you to the first tab, Command + 2 will take you to the second, and so on.
Option + Delete — This handy keyboard shortcut will delete words one word at a time, as opposed to one letter at a time. This works all across OS X, whether you’re typing in TextEdit or even when typing a website into your browser’s URL bar.
Command + H — Quickly hide all open windows from the currently active app.
Command + Shift + T — Instantly open up the most recently closed tab in your browser. This is a lifesaver if you accidentally close a window and can’t remember the URL.
Command + F3 — This handy shortcut instantly removes all app windows from view and lets you take a gander at your desktop. To bring your apps back, simply press the keys again.
Option + Shift + Volume Up/Volume down — Increase or decrease your machine’s volume in much smaller increments. This comes in especially handy when you’re trying to get your audio output levels just right.
