Questions on manual scan mode (without turntable):

- in the 2 object pictures below, there are parts highlighted in red, does it mean anything special ?

- the projector always displays a black horizontal band across the scan window, quite large, it seems to interfere with the scan, meaning the part covered by the band don't scan as well as the rest of the part, i think. In "turntable mode", i don't have this black horizontal band.