2012

PURGE
Removes unused items, such as block definitions and layers, from the drawing.
CLAYER
Sets the current layer.
LAYERDLGMODE
Sets the flavor of the Layer Properties Manager that is defined for the use of
the LAYER command.
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 Layer Properties Manager. 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.
When you use Layer Previous, it undoes the most recent layer change or set
of changes made. Every change you make to layer settings is tracked and can
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