SECTION./MINM
FIND/MINMAX frame
	find min, max of frame and corresponding pixel numbers
SECTION./PIXE
FIND/PIXEL frame lo,hi [inout_flag] [first_flag] [out_spec] [maxnpix] [area]
	find first/all pixel(s) with a value in/outside interval [low,high]
SECTION./PXPOS
FIND/PXPOS in_image [out_table] option disp_flag
	get pixel positions of input image in given data intervals
