These options set the position of the image in some field (e.g. on a screen)
in columns to the right of the left edge and rows below the top edge.
The PCX format contains image position information. Don't confuse this
with the position of an area of interest within the image. For example,
to add a 10 pixel left border to an image and then converting that image to PCX
with xpos = 0 is not the same as converting the original image to PCX and
setting xpos = 10.
The values may be from -32767 to 32768.
The default for each is zero.