thanks for the replies, sorry
jgpaiva, it didn't occur to me that GridMove would be useful in a multi-monitor setup too and maybe this thread can be used to collect all possible multi-monitor tools..
as for
justice's points, even though some games work ok but other games & educational programs insist assiduously on a single monitor. and also like
mwb1100, i'd prefer a docking type of system because sometimes my wife or kids use the pc and i didn't want the dual-monitor to be overwhelming..
mwb1100, i thought of emailing devs too about support for multi-monitors but that would be a crusade and i haven't the energy for that..
btw, i also use the Alt+Space+M combo for the time being..