2012

Table Of Contents
What default linetype and lineweight are assigned to all objects on a layer
Whether objects on a layer can be modified
Whether objects display with different layer properties in individual layout
viewports
Every drawing includes a layer named 0. Layer 0 cannot be deleted or renamed.
It has two purposes:
Ensure that every drawing includes at least one layer
Provide a special layer that relates to controlling colors in blocks
NOTE It is recommended that you create several new layers with which to organize
your drawing rather than create your entire drawing on layer 0.
For information about controlling the display and behavior of the Layer
Properties manager, see
Specify the Behavior of Dockable Windows on page
163.
Quick Reference
CLASSICLAYER
Opens the legacy Layer Properties Manager.
LAYER
Manages layers and layer properties.
SHOWLAYERUSAGE
Displays icons in the Layer Properties Manager to indicate whether layers
are in use.
Use Layers to Manage Complexity
You can use layers to control the visibility of objects and to assign properties
to objects. Layers can be locked to prevent objects from being modified.
You can reduce the visual complexity of a drawing and improve display
performance by controlling how objects are displayed or plotted. For example,
you can use layers to control the properties and visibility of similar objects,
Use Layers to Manage Complexity | 381