Lock and Unlock Layers Propeties in AutoCAD.
Lock an unlock layers is metode in autoCAD to keep the block,layer and others,to be safe or protective, so can’t to editing,deleteing ,modify etc.
Lock and unlock layer in autoCAD metode is :
Click format in menubar → select layer → clik padlock in layer properties manager,
Clik layer properties manager tool/icon in toolbar or click layer control → select or click padlock to lock and unlock layers.
Type LAYLCK in command windows → select line / arc / circle that to be locked.