The default display is that Number is a frozen mandatory column that is frozen (so it does not scroll) in the Uses tab. Lets consider that we wish that Name is a mandatory attribute to display, that it and Reference Designator Range are frozen columns, Number is not frozen and is displayed though optional, Line Number is available but not displayed. As Number is optional, it is removed from the tabular input search.

The following figure shows how the PSE User Interface appears.