You can perform PDM-like actions within any library, to subset objects and members. A common shortcut in PDM is to type 12 beside a library, and then press F4 to subset objects or members within that library. Support is provided in the Remote System Explorer so that you can subset these items directly in any library. This is in addition to the standard method of expanding Work with objects or Work with members and specifying the library, to perform the same task.
You can use either the Remote Systems tree view or the Object Table view to subset from a library. This example explains how to subset items from the Remote Systems view, but the task is the same from the Object Table view except your starting point. See the related link for more information about the Object Table view.