Layers
In SolidWorks, you can specify the color, style, and thickness of lines
in named layers. You can move objects into layers, and you can turn layers
on and off. The layer list is built into many annotation and dimension
dialog boxes.
You can also format lines individually using the Line Format tools. You can specify
document-level line thickness and style. Click Tools,
Options, Document
Properties and set Line Font,
Line Style, and Line
Thickness.
Layers are used less often in SolidWorks than in 2D CAD systems. SolidWorks
has multiple drawing sheets, and you can hide and show drawing views,
assembly components, lines, and various other items without using layers.
In addition to creating layers in SolidWorks, you can import 2D CAD
drawings with layers into SolidWorks. All 2D CAD layers are preserved
in SolidWorks. When exporting from SolidWorks, you can map entity types
to specific layers.
The Layer toolbar contains a list of layers in the drawing and the Layer Properties tool 
.
Click the Layer Properties tool to bring up the Layers dialog box. Create new layers
and specify the Color, Style,
and Thickness of lines in each
layer.
