1d (and possibly 2d) space-time patterns are presented in successive horizontal rows starting at the top of the screen (on the left). 2d network may be given a similar time dimension, see #26.1.5, 26.2.3). When the pattern reaches the bottom of the screen, the iteration may be set to pause, otherwise the pattern is deleted and continues from the top. The following prompt is presented,
PAUSE on space-time screen full-p: