shortcutsguide

Star in Gmail (press S)

Star the selected email from the keyboard: press S. Same key on Mac and Windows.

ActionMacWindows
Star / unstar s s
Select conversation x x
Archive e e
Mute m m

Star without the mouse

Hover or select a conversation and press s to toggle a star. Same key on Mac and Windows. Press s again to remove it.

Enable keyboard shortcuts

Single-key Gmail actions need shortcuts turned on: Settings → See all settings → General → Keyboard shortcuts on → Save Changes.

FAQ

What is the star shortcut in Gmail?

Press S (same on Mac and Windows) to star or unstar the selected conversation.

How do I cycle through star colors?

Press S repeatedly to rotate through the stars you enabled in Settings → General → Stars.

Why doesn't S work?

Turn on Keyboard shortcuts in Settings → General → Keyboard shortcuts on.