To Manually Attach a Level Library

In the Level Manager dialog, from the Levels menu's Library submenu, choose Attach.
The Attach Level Library dialog opens.
Select the level library to attach and click OK.
The levels from the library display at the bottom of the Level List.

Note: The manual attachment of libraries is useful when attaching a limited number of libraries to a small number of DGN files. If you need to make a larger number of libraries available to a larger number of DGN files, you can use the MS_DGNLIBLIST configuration variable. This configuration variable allows you to define the path to specific level libraries that MicroStation looks for levels. This eliminates the need to attach each level library to each DGN file.