Put this on a toolbar button:
@if:Set FLATVIEW=On
Set FLATVIEW=Off
Set HIDEFILTERFILENAME
@if:else
Set HIDEFILTERFILENAME=*
Set FLATVIEW=On
If you wanted Flat View (Grouped), change the last line to this:
Set FLATVIEW=On,Grouped
Put this on a toolbar button:
@if:Set FLATVIEW=On
Set FLATVIEW=Off
Set HIDEFILTERFILENAME
@if:else
Set HIDEFILTERFILENAME=*
Set FLATVIEW=On
If you wanted Flat View (Grouped), change the last line to this:
Set FLATVIEW=On,Grouped