TVCHAN 0.0 16.0 TV channel selection GRCHAN 0.0 8. Graphics channel too?
OFFSCROL Type: Verb Use: Restores TV scroll (position shift) to zero. Adverbs: TVCHAN.....Specifies TV channel. If zero, OFFSCROL uses all enabled channels. GRCHAN.....If > 0, the graphics overlays also have scroll set to zero (all grpahics channels scroll together).