-4 duplicates clickable 'Reset' button, and does only one thing- resets LRF for the next lase by TC (for GNR, releasing palm switches does the same thing)
-Num0 is a 'Battle Range' button, and brings LRF LOS in alignment with GPS LOS at ~1600meters (do not remember exactly) for close range engagements to minimize error due to parallax; only wat to reset it in SB- to fire LRF, and none of clickable buttons have right click action; if you right-clicking, you are lasing.