The loadstep section lets you specify from which loadstep(s) to extract grid point force information.  Loadsteps with grid point force results from the currently selected results file are displayed for selection only.  Multiple loadsteps can be selected via Ctrl-click or Shift-click functionality.  Filter buttons allow for additional selection control as shown including a name filter that uses standard filtering syntax.  The loadstep list can be switched between ID and Name (ID).

The ID option lists the loadsteps in the format SUBCASE ID.  The Name (ID) option lists the loadstep in the format NAME – ITERATION (ID).