You could possibly do it with a script,
Code:
-- Show all FX as floating
for i = 0, reaper.CountTracks(0)-1 do
track = reaper.GetTrack(0, i)
for fx = 0, reaper.TrackFX_GetCount(track)-1 do
reaper.TrackFX_Show(track, fx, 3) -- showflag=0 for hide chain, =1 for show chain, =2 for hide floating window, =3 for show floating window
end
end
EDIT, just noticed, there are SWS actions to do that also,...
SWS/S&M: Show all floating FX windows (!)