Lock and unlock objects
Lock objects to prevent accidental edits, then unlock them when needed.
Locked objects will not be selected by the Lasso, unless you've enabled Select locked objects in the Lasso Tool settings. In the Eraser settings, you can also toggle Erase locked objects to allow/disallow erasing locked objects

To lock objects:
- Select the Lasso tool. Use the lasso tool to select the objects you want to lock.
- Tap the lock button.
To unlock objects:
- Select the Lasso tool. Tap the Lasso tool button again to open the lasso settings.
- Enable Select locked objects. Close the lasso settings.
- Use the lasso to select the objects you want to unlock. Tap the unlock button.