Horizon Fitness 7.4AT Owner's Manual page 22

Roll forward/backward to increase/decrease incline.
HOW TO PROGRAM AND USE CUSTOM INTERVAL BUTTONS
The programmable interval buttons located on the pulse rate grips are designed to help you customize this machine to match whatever
workout you like to do the most.
The LEFT and RIGHT INTERVAL BUTTONS are programmable for speed and incline.
To program the INTERVAL button, you must select a user, start the machine, set the desired speed and incline, press and hold the
desired INTERVAL button for three seconds until the treadmill beeps. Now the INTERVAL button is programmed to your settings. After
programming the INTERVAL button, it will remember the setting for that user until reprogrammed.
Now when the INTERVAL button is pressed, the treadmill speed and incline will change to the settings you programmed for that button.
The most common type of workout these keys will help with is interval training. We suggest programming one of the INTERVAL buttons to
your high intensity segments and the other to your recovery segments.
Another common use is to set one INTERVAL button to your warm up and cool down settings and the other to your desired workout
settings.
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These buttons should allow you to customize the settings of your treadmill to quickly fit the type of workout you enjoy most.
INCLINE SCROLL WHEEL
INTERVAL BUTTON 1
SPEED SCROLL WHEEL
Roll forward/backward to increase/decrease speed
INTERVAL BUTTON 2