SELF_DISPLAY

    If  YES,  display  Clean  image before each calibration loop, and prompt for
    user input. If YES, Cleaning at each step will use the number of  iterations
    specified  by  NITER,  while if set to NO, Cleaning will stop at SELF_NITER,
    saving time.

    The dynamic range progress report is accurate only if SELF_DISPLAY is set.