Locking and Unlocking Floating Objects
You can lock floating objects to avoid inadvertently moving them as you work. Inline
objects cannot be grouped or locked.
After you lock individual or grouped objects, you can’t move, delete, or modify them
in any way until you unlock them. However, a locked object can be selected, copied, or
duplicated; when you copy or duplicate a locked object, the new object is also locked.
To lock a floating object:
Select the objects you want to lock, and then choose Arrange > Lock.
To unlock a floating object:
Select the objects you want to unlock, and then choose Arrange > Unlock.