Shift-Command-5: In macOS Mojave or later, take a screenshot or make a screen recording.

It's generally the key above the Tab key and to the left of the number 1.)

(The character on the second key varies by keyboard. Command–Grave accent (`): Switch between the windows of the app you're using.

Command-Tab: Switch to the next most recently used app among your open apps.

Space bar: Use Quick Look to preview the selected item.

Control-Command-F: Use the app in full screen, if supported by the app.

Control–Command–Space bar: Show the Character Viewer, from which you can choose emoji and other symbols.

Learn how to change a conflicting keyboard shortcut.) (If you use multiple input sources to type in different languages, these shortcuts change input sources instead of showing Spotlight. To perform a Spotlight search from a Finder window, press Command–Option–Space bar.

Command–Space bar: Show or hide the Spotlight search field.

To close all windows of the app, press Option-Command-W.

Command-O: Open the selected item, or open a dialog to select a file to open.

To minimize all windows of the front app, press Option-Command-M.

Command-M: Minimize the front window to the Dock.

To view the front app but hide all other apps, press Option-Command-H.

Command-H: Hide the windows of the front app.

To find the previous occurrence, press Shift-Command-G.

Command-G: Find Again: Find the next occurrence of the item previously found.

Command-F: Find items in a document or open a Find window.

In some apps, you can undo and redo multiple commands. You can then press Shift-Command-Z to Redo, reversing the undo command.

Command-V: Paste the contents of the Clipboard into the current document or app.

Command-C: Copy the selected item to the Clipboard.

Command-X: Cut the selected item and copy it to the Clipboard.

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