About Creating and Naming Layers
You can create and name a layer for each functional category of objects (such as
walls or dimensions), and assign it properties to be common to the objects on the
By organizing objects into several layers, you can control the visibility and object
properties of a large number of objects separately for each layer, and reduce the
visual complexity of a drawing when creating or modifying objects. The number of layers
that you can create in a drawing and the number of objects that you can create on
each layer are practically unlimited.
Choose Layer Names Carefully
The layer names in a drawing are often specified by corporate, industry, or client
standards. If you organize your own layer scheme, choose layer names carefully. Use
common prefixes to name layers with related drawing components to make it easier to
manipulate groups of layers.
If you consistently use a specific layering scheme, you can save time by creating
and saving a drawing as a drawing template (DWT) file with layers, linetypes, and
colors already assigned. For more information about creating templates, see Use a
Template File to Start a Drawing.
- A layer name can be up to 255 characters long (double-byte or alphanumeric), and include
letters, numbers, spaces, and several special characters. Layer lists are sorted alphanumerically,
with special characters first, numbers in value order, and alpha characters in alphabetic
- Layer names cannot include the following characters: < / â€œ : ; ? * | = â€ک
- The Layer Properties Manager sorts layers alphabetically by name.
Specify a Layer to Draw On
As you create objects, they are placed on the current layer. You switch from one layer to another by making a different layer current; any subsequent
objects you create are associated with the new current layer and use its color, linetype,
and other properties. You cannot make a layer the current layer if it is frozen or
if it is an xref-dependent layer.
You can remove unused layers from your drawing with PURGE, or by deleting the layer
from the Layer Properties Manager. 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.
or one based on a set of layering standards.
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