Xsi3.0:add marker on a range of frames?

[geoath]

hi!
this is fundamental but i can't find a solution :
in xsi 2.5 i could select a range of frames on a clip and add a marker on a clip or even on a track..
now in xsi 3.0 i cannot do any of them..is this feature missing or am i doing something wrong?
(i don't ask for the one frame "add marker" command)
i simply want to add annotations under a sound clip in animation mixer to break down speech..

thanks in advance
george