Ricoh A251 Operating Instructions Manual page 46

Paper length count up/down, Paper length up/down speed, and Paper size pattern: When
you press the preset length key, the copier scrolls through a selection of preset paper sizes. The
copier can scroll through the preset lengths forward or backward, and at different speeds. There
are many sets of sizes from which to choose. Ask your service representative for details.
Auto off time: You can set the machine waits after the last operation before switching itself off
automatically. The time can be set by minute from 1 to 240 minutes.
38