Press Command (⌘) + – (minus) to zoom out
Use Command (⌘) + 0 (zero) to return to default zoom
Hold the Option (⌥) key and use the trackpad pinch-out gesture (if your app uses this direction)
Use the trackpad pinch-out gesture to zoom out (two fingers moving apart)
On a mouse, hold Command (⌘) and scroll down to zoom out (if supported by the app)
In Safari: View menu → Zoom Out
In Chrome/Edge: Menu (⋮) → Zoom → Zoom out
In Firefox: View menu → Zoom → Zoom out