Deck shows your Mac's extensions as keys: tap one to open it on the Mac, tap again to close it. Edit the layout to choose the grid size and the extension to feature. Turn the phone sideways for Deck mode, a full-screen pad of big keys; tap with three fingers to leave it.
Trackpad turns the screen into a Mac trackpad:
- One finger to move, tap to click, double-tap and hold to drag.
- Two fingers to scroll, tap with two to right-click.
- Pinch to zoom.
- Swipe three fingers left or right to switch Spaces, up for Mission Control, down for App Exposé.
Airmouse points instead: hold the big button and aim the phone at the screen, and the cursor follows. Let go to stop. Click and scroll with the controls beneath it.