Locking an object prevents it from being moved or altered in any way. This feature is especially handy when used in conjunction with a complex drawing. The objects that you've completed or don't want to alter by mistake can be locked, leaving the remaining objects available for selection and editing.
Use the Pick Tool to select the object(s) that you wish to lock.
Choose Arrange > Lock Object. The handles of the object(s) change to tiny padlocks (Figure 14.3).
Figure 14.3. When you select a locked object, the normal black handles are replaced by padlocks.
If you want to modify a locked object, you must ...