Change your Footer into a Trailing Grand Summary part and the gap should disappear. Of course, you will no longer see the bottom after you have enough records that the Trailing Grand Summary is pushed past the bottom of your screen...
The solution might be to have two layouts, one with a Trailing Grand Summary and one with a Footer, but identical in all other respects. A triggered script might be devised that checks the number of records in your found set and switches layouts as appropriate.
That worked perfectly. Thanks so much. Good idea with the second laoyout. I might consder that but the fix you provided should be sufficient for now. I am OK with the vertical scroll bar in list view since that is an expected behavior in multiple results.
Thanks for help.