LAYULK command
Unlocks the layer of a selected entity.
            Icon: 
Description
Unlocks the layer of a selected entity to enable entities on that layer to be edited.
Method
You are prompted:
Select an entity on the layer to be unlocked
Select an entity on the layer you want to unlock. The Command line indicates which
            layers have been locked:
      - This layer has been locked: LayerName1
 - This layer has been locked: LayerName2
 

