If link sets exist in the open DGN file or in the configured DGN libraries, a link set appears in the Project Explorer dialog's Links tab. The default link set is the one that you were viewing most recently. If you have switched to a different DGN library, the first link set in that DGN library appears.

The active link set's name appears in the drop-down list box and its links appear below its name. The links may be in folders, which you open and close by clicking the plus and minus signs to the left of the folders.

If the active link set is not the one you want to explore, use the Project Explorer dialog’s Link tab to select a different link set from the current source. If you want to select a different link set from a different source, open the Link Sets dialog.

Link sets come from one of three sources:

• Configured Libraries — Displays all of the links sets in all of the files specified by the MS_DGNLIBLIST configuration variable. If Configured Libraries is the source of your link set, you will be unable to modify the link set at this point. You will not be able to create or delete folders or links. To modify a link set from the Configured Libraries, you must open the file containing the link set. The name of the file in which the link set is stored appears in the File column in the list box.

• Active File — Displays the link sets stored in the open DGN file. If this is the source of your link set, you will be able to modify the link set, but you will be unable to use the Undo button to reverse any changes you make.

• Selected File — Allows you to select a particular DGN file and displays the link sets contained in that DGN file. Click the Browse icon to select a file. If this is the source of your link set, you will be able to modify the link set, but you will be unable to use the Undo button to reverse any changes you make.

The recommended way to access your link sets is through your configured libraries. If you select Configured Libraries, you will be able to select from all link sets stored in the location to which the MS_DGNLIBLIST configuration variable points. Link sets stored here are available to all users whose configuration variable points to this location.