It used to be possible to use shift-tab to move round in the opposite
direction than tab; it seems to have the same effect as tab now.
for the GUI screens that I have quickly looked at, Shift tab will reverse walk
the fields ... are there particular screens that are not working for you ...?
(for the TUI screens, Alt-Tab will do the trick ...)
Ah, I was using the TUI. I'd forgotten alt-tab.