Lock or unlock an object
The column under the Lock all/Unlock all button indicates whether an object on the artboard is locked. When the lock button is visible in the row that corresponds to an object, then the object and all of its child elements are locked.
Note
You cannot modify an object when it is locked.
To lock an object on the artboard
Under Objects and Timeline, click the dot button in the same row as the object.
The dot button turns into a lock to indicate that the object is locked.
To unlock an object on the artboard
Under Objects and Timeline, click the lock button in the same row as the object.
The lock button turns into a dot to indicate that the object is no longer locked.
To lock or unlock all objects on the artboard
Under Objects and Timeline, click the Lock all/Unlock all button above the object tree.
A lock appears beside all of the locked objects in the object tree.