IBM 1725 SLS - Manual (Page 269)

CCITT
Commands
C-19 Document Option Commands
ImageSize
ImagePosition
Function Sets the image size to be used for decompression of the image
data that follows the %%ImageData command.
Syntax %%ImageSize (width height)
width The width of the image in pixels.
height The height of the image in pixels.
Default None.
Notes This command must be used in order to decompress an image.
This command must be sent before the %%ImageData
command. If it is not, the image is ignored.
Function Sets the image position (in 0.001" increments) from the upper-left
corner of the page.
Syntax %%ImagePosition (x y)
x The horizontal location of the image's upper-left
corner.
y The vertical location of the image's upper-left corner.
Default 0 0—Places the image in the upper-left corner of the page.