Lock Position
To lock an object’s position, click on the object to select it and click the Layout | Position | Lock command. You may also right-click on the object and select Lock Position. When an object is locked it cannot be moved either through the ribbon X and Y boxes, by dragging it with the mouse, or by changing object properties in the Property Manager. Objects that are position locked can be resized.
Repeat the above instructions to unlock a locked object.
When an object's position is locked, the object's visibility check box
in the Object Manager appears
with a lock in the bottom-left corner 
.
When an object's position and size are locked, the box appears with locks
in both lower corners 
.