3. select either the 320x200 subfield mode or 120x120 pixel subfield mode. 4. select the number of frames to average. Note that in 120x120 mode 30 frames will take 1 second, but in 320x200 mode 30 frames will take 3 seconds. Try k followed by j. If you get totally confused, hit the lowercase 'z' key to reset just the display lookup table back to the default.
Diagonal motion is supported.
Some Do's and Don'ts DO use a guide box somewhat larger than the star. Sky is determined from the outer 2 pixels of the box. DO keep the sky level between 30 and 100. Too high a sky level and the dynamic range is much reduced. Too low a level and the pixel rejection schemes get confused.