At the top of the tab, a pane called MDB displays a listing of the MDBs defined in Clash Manager. Against each MDB is a checkbox, which is checked by default when the MDB is first defined. As required, the administrator can un-check a checkbox to remove the particular MDB from the Track Changes operation.

In the middle of the tab, a pane displays a listing under headings of GTYPE and State. The listing is used to present a list of available GTYPEs and to enable certain of them to be made Controlled or Uncontrolled. (Only a Controlled GTYPE is the subject of a Track Changes operation.)

At the bottom of the tab, a pane is available for specifying rules that further restrict the range of GTYPES to be included in the Track Changes operation. For the syntax of the Tracking Selection Rules refer to Notes on Element Rule Syntax.

Each Site and everything below it will exist in a single DB [name clashes are not impossible, two sites with the same name may exist in different DBs, but only one would be generally accessible through its name when included in the same MDB]. All branches of a PIPE would be in a single DB, but that DB and thus the PIPE may be visible through more than one MDB.

Clash Manager can combine MDBs and in the process may encounter duplicates, in which case Selection Rules may return other starting points in the hierarchy, for example, a list of ZONES.