Sometimes the pointer should stay where it is. A game pushes it against the edge of the screen, you are drawing or trimming a clip right beside the edge, or you are presenting and a stray swipe would carry the pointer onto a Mac nobody in the room can see. Lock pointer to this Mac keeps it on the Mac it is on until you let it go. It is in Free.
Lock and unlock
Press Globe/fn + L (default). The pointer stops crossing to other Macs,
in every direction, until you press the same keys again.
You do not need to remember the shortcut. The menu bar panel has a round lock button just left of the Pause button at the top. An open grey padlock means the pointer is free: click it to lock. A closed amber padlock means the pointer is locked: click it to unlock. Hold the pointer over the button to see the shortcut. The button appears once a Mac is paired.
It locks the pointer to the Mac it is on at that moment. If you are controlling another Mac when you press it, the pointer stays on that Mac.
While it is on, the Continuo icon in the menu bar carries a small padlock in its bottom-right corner, and the menu bar panel says Pointer locked to this Mac, with a second line naming the keys to unlock, and an Unlock button. A small notice at the top of the screen confirms each change. The edge you push against glows, so a held edge never looks broken.
When you lock it on the Mac you are controlling
The lock shows where you are looking. If you are at one Mac, driving another, and you lock the pointer, the Mac you are controlling shows it: the notice appears on its screen, its Continuo icon carries the padlock, and its panel says Pointer held here by the Mac you are at, with Unlock it from that Mac under it.
Unlock from the Mac with the keyboard: press the same keys again, or click the amber lock button in that Mac’s panel. On the Mac being controlled, the lock button shows a closed padlock, dimmed, and cannot be clicked; hold the pointer over it to see which Mac holds the lock and which keys to press there. The lock clears from its screen the moment you unlock or move the pointer away with the Return hotkey or QuickJump. Both Macs need a current version of Continuo for this.
The lock lasts until you unlock it. Quitting or relaunching Continuo starts it unlocked again.
What still works
Only edge crossing stops. The rest of Continuo carries on as before:
- Clipboard keeps syncing between your Macs.
- Sending files keeps working: drop a file on the notch to send it to another Mac. A drag across the edge stops at the edge, as the pointer does.
- The Return hotkey and QuickJump still move the pointer when you ask them to. The lock stops accidental crossings, not deliberate ones.
That is the difference from the Pause input sharing button in the menu bar panel, which stops sharing between your Macs until you resume it.
Change the shortcut
Under Settings → Control & Edges → Shortcuts → Lock pointer hotkey, record any combination with at least one modifier key, or reset it to the default.
See Keyboard shortcuts for the other keys, and Keyboard and mouse for how edge crossing works.