2013

 Deleted layers: If you delete or purge a layer, using Layer Previous does not
restore it.
 Added layers: If you add a new layer to a drawing, using Layer Previous does
not remove it.
See also:
Change Layer Settings and Layer Properties
LAYERPMODE
Turns on and off the tracking of changes made to layer settings.
Summary
When Layer Previous mode is on, changes made to layers are tracked. When
Layer Previous mode is off, changes made to layers are no longer tracked.
See also:
Change Layer Settings and Layer Properties
LAYFRZ
Freezes the layer of selected objects.
Access Methods
Button
Toolbar: Layers palette  Freeze Layer
Menu: Format  Layer Tools  Layer Freeze
Summary
Objects on frozen layers are invisible. In large drawings, freezing unneeded
layers speeds up operations involving display and regeneration. In a layout,
you can freeze layers in individual layout viewports.
558 | Chapter 2 Commands