2013

Remove Layers
You can remove unused layers from your drawing with PURGE or by deleting
the layer from the Layers palette. You can delete only unreferenced layers.
Referenced layers include layers 0 and DEFPOINTS, layers containing objects
(including objects in block definitions), the current layer, and xref-dependent
layers.
WARNING Be careful about deleting layers if you are working on a drawing in a
shared project or one based on a set of layering standards.
Change Layer Settings and Layer Properties
You can change the name of a layer and any of its properties, including color
and linetype, and you can reassign objects from one layer to another.
Because everything in your drawing is associated with a layer, it's likely that
in the course of planning and creating a drawing, you'll need to change what
you place on a layer or how you view the layers in combination. You can
 Reassign objects from one layer to another.
 Change the name of a layer.
 Change the default color, linetype, or other properties of the layer.
Reassigning an object to a different layer is useful if you create an object on
the wrong layer or decide to change your layer organization. Unless the color,
linetype, or other properties of the object have been set explicitly, an object
that you reassign to a different layer will acquire the properties of that layer.
You change layer properties in the Layers palette. Click the icons to change
settings, and rename layers or change descriptions.
Undo Changes to Layer Settings
You can use Layer Previous to undo changes you make to layer settings. For
example, if you freeze several layers and change some of the geometry in a
drawing, and then want to thaw the frozen layers, you can do this with a
single command without affecting the geometry changes. In another example,
if you changed the color and linetype of several layers but later decide you
prefer the old properties, you can use Layer Previous to undo the changes and
restore the original layer settings.
124 | Chapter 6 Create and Modify Objects