This command erases all the entities on the specified layers and deletes the layers from the drawing.
1 In the Erase by Layer/Type dialog box, you can enter the name of the layer to be deleted, or you can specify a layer to delete by picking an entity on that layer.
● Layers of entities to erase: This field displays the layer names to be erased. You also have the option of typing layer names in this field.
● Select Layers from Screen: This option allows you to select entities on the layers you want deleted.
● Select Layers by Name: This option allows you to choose a layer name from the list of layers in the drawing.
2 Under Types of entities on matching layers to erase, you specify which types of entities to erase.
You can clear All and specify which entity types to include in the selection set. For instance, if you have both linework and points on the same layer, and you want to erase only the linework, you can clear All and select Line and Polyline.