Levels

Each element in a model is on a drawing level. Levels are analogous to transparent overlays: In different combinations they make it easier to see parts of a model. There can be virtually an unlimited number of levels (4 billion) in a DGN file.

You can set up a level structure to make it easy to manipulate the display of various levels and save the level structure in a separate file to make it easier to use with other designs.

For more information about models, see Models.