4 track recording with tascam us 4x4 hr

hallo community,
after a long try&error i got A. to record with 4 tracks.
But now, starting a record, the screen shows in vertical 2 and 1/2 tracks, what makes gain control difficult. even setting the vertical fit does not work. besides, the gain-Bar shows only 2 tracks, like in stereo mode. if at least at this place having 4 tracks woud help.
(in playback-mode i can fit the tracks in vertical.)
i woud be glad, to get help! thanks