Layers are used to group objects in a drawing by function and to enforce standards for color, linetype, lineweight, and other
Layers are the equivalent of the overlays once used in paper-based drafting. By creating layers, you can associate similar
types of objects by assigning them to the same layer. For example, you can put construction lines, text, dimensions, and title
blocks on separate layers. You can also organize objects by function and to assign default object properties including color,
linetype, and lineweight to each layer.
Layers are an important organizational tool and can reduce the visual complexity of a drawing and improve display performance
by controlling how objects are displayed or plotted.
With layers, you control the following:
- Whether the objects on a layer are visible or hidden
- Whether objects use the default properties such as color, linetype, or lineweight for that layer, or whether object properties
are assigned individually to each object
- Whether and how objects on a layer are plotted
- Whether the objects on a layer are locked and cannot 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 to ensure that every drawing includes at least
NoteIt is recommended that you create several new layers with which to organize your drawing rather than create your entire drawing
on layer 0. These layers can be saved in a drawing template (.dwt) file to make them available automatically in a new drawing.