Click Tools > Display Manager.
On the Sheets tab, set the options you want to use for displaying elements in a window. The color, line type, and width settings are applied to all the elements on the sheet.
To set the display for a specific layer on a sheet, select the sheet on the Sheets tab. The layers that are in that sheet are displayed on the Layers tab. You can specify display settings for each layer in a sheet by clicking the Layers tab and setting the options you want.
If you want to quickly display or hide layers for the current drawing sheet, you can click Layers on the Tools menu. Then, on the Layers ribbon, you can click Layer Status to display or hide layers.