This is the computer you are about to control.

Tap to click, and drag to move things about — a list scrolls, a window moves, a selection follows your finger, exactly as it would on that computer's own screen. Hold still for a right-click. Pinch to zoom in, and two fingers together push the picture around. The « button has the keys a phone does not have, and the way back to the whole screen.

Somebody at that computer has to approve this, and will be asked again every time — unless they choose Approve always, which lets this phone connect on its own until they unpair it.