Precor LOW-IMPACT TREADMILLS 9.33 Owner's Manual page 28

To adjust the speed of the running belt in larger
increments, take the following steps.
1. To adjust the speed, press the appropriate SPEED up or
down arrow key.
2. Within three seconds, press a number 0–12 for miles
(0–20 for kilometers) followed by a zero, and then press
ENTER.
If you wish to cancel the speed adjustment, press either
SPEED arrow key. The display indicates the current
speed of the running belt.
Owner's Manual: Display Console 26