SAP BusinessObjects Enterprise InfoView User's Guide

If you apply a sort, filter, or rank condition to a member in a crosstab, and then that member is hidden, the sort, filter, or rank still applies. Members can become hidden if you perform a focused drill-down, if you manually hide or deselect members, or if you apply a second condition that excludes the first member.

If your data has hidden conditions applied, you can click the Display Member Settings button to view the list of conditions. Then, you can use the Member Selector to restore the hidden members to the crosstab if desired.