* A source image can only supply information to a program. [[POINT]] and [[GET (graphics statement)|GET]] might require a source other than the one currently active.
: ''Explanation:'' Create a new image with handle 'a', then use [[_DEST]] to define the image to draw on. Draw a pixel then set the source to 'a' and use [[POINT]] to show what color is in that position. White (15) and is the color set with [[PSET]]. Use [[_DEST]] 0 for the screen to display the results.