Ribbon: Home tabLayers
panelLockNot available on the ribbon
in the current workspace.
Menu: FormatLayer
ToolsLayer
LockNot available in menus
in the current workspace.
Toolbar: Layers
II
Summary
Using this command, you can prevent objects
on a layer from being accidentally modified. You can also fade the
objects on a locked layer using the LAYLOCKFADECTL system variable.