Is there any way to show/hide border toolbars from a button.
If not put it on the feature request list please 
Yes.
Manual makes it clear - Set FDBTOOLBAR.
I use this:
@if:Set FDBTOOLBAR="Steve.File.Display"
Set FDBTOOLBAR="Steve.File.Display,Steve.Drives"
@if:else
Set FDBTOOLBAR="Steve.File.Display"
It toggles a second FDB toolbar on and off under the main one. Change the names to suit yours of course.
Thanks again, a great help.