Use layers
Using layers organizes objects so you can manipulate them all at once or keep track of them. When objects have a layer assignment, you can turn them all off at once, change their wireframe display color, and select them all with one selection.
Manage layers
Layer
Toggle Layer panel.
LayerStateManager
Save and restore the current layer state.
DupLayer
Duplicate (copy) a layer including all layer attributes and geometry.
OneLayerOff
Turns off the selected object's layer.
OneLayerOn
Turns a specified layer on and all other layers off.
Purge
Delete unused block definitions, groups, layers, hatch patterns, linetypes, annotation styles, and materials.
Edit layer properties
SetLayerToObject
Set the current layer to match a specified object.
Object layer properties
ChangeLayer
Change an object's layer.
ChangeToCurrentLayer
Change an object's layer to the current layer.
CopyToLayer
Copy objects to a layer.
MatchLayer
Change an object's layer to match another object.