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Button & Side-Button Mapping

macOS treats most extra mouse buttons as dead weight. Mouse+ turns side buttons, wheel tilt, and thumb buttons into real actions — back/forward, app launches, window controls, media keys, or any shortcut you record.

Mappable buttons​

Depending on your device, Mouse+ exposes named button slots:

  • Left, Right, Middle
  • Side 1–Side 4 (side buttons)
  • Wheel Tilt Left / Wheel Tilt Right — tilting the wheel left or right, used for horizontal scrolling
  • Scroll Mode slot on MX Master and MX Anywhere models (toggles the MagSpeed wheel)
  • Thumb slot on MX Master models (behind the thumb rest) — MX Anywhere models don't have this button
  • Thumb slot on Logi Lift, POP Mouse, MX Master 4 (each maps to a different physical button — see the per-model guides for placement)

For recognized mice, side buttons are mapped automatically after detection, so there is less manual setup.

Action types​

Each mouse button (and gesture) can trigger one of:

  • Open Application — open a specific application.
  • System Setting — window controls, Mission Control, Switch Space Left/Right, Control Center, Notification Center, screenshots, Finder actions, and developer workflows.
  • Media Control — playback and volume, grouped under a dedicated Media Control category.
  • Keyboard Shortcut — record any key combination, including plain single keys and system-reserved keys, with the built-in shortcut recorder.
  • Modifier Hold — hold a modifier while the button is pressed (see below).
LinguaX Mouse Settings dialog: Global vs per-app scope, button pills (M / ML / MR / S1 / S2 / T), and a Click → Launchpad binding on TLinguaX Mouse Settings dialog: Global vs per-app scope, button pills (M / ML / MR / S1 / S2 / T), and a Click → Launchpad binding on T

For AppleScript-based custom actions, see Shortcuts & Hotkeys.

Modifier-hold​

A button can hold the Fn (Globe) modifier for as long as you press it, releasing the instant you let go. This is the foundation for push-to-talk: holding the button injects the Fn/Globe key to start macOS Dictation, and releasing stops it. See Push-to-Talk Voice Typing with a Mouse Button.