Levels are used to organize and control the visibility of graphical elements in a DGN. Levels allow you to group related elements together and control their display properties.

Each element in a DGN is assigned to a specific level. You can create, modify, and delete levels as needed. Levels can be turned on or off individually, and you can set different display properties for each level.

By using levels effectively, you can simplify the drawing display and make it easier to work with. For example, you can turn off the levels containing reference data or background information to focus on the main content.