Permobil Total Control Head Array User Manual page 15

An arrow on the OMNI display indicates the direction the wheelchair will
travel when the forward command is given. After using the mode switch or
auto-toggle (see below), the arrow on the display will change to the opposite
direction. Driving with the forward command will be in the direction
indicated by the arrow on the display.
The three most common methods to change between driving forward and
rearward are:
1. Mode switch — OMNI:
Briefly activate and release mode switch
2. Auto-toggle — OMNI:
Your OMNI interface can be programmed to automatically toggle the
direction of travel linked to the forward command.
If this is the case, briefly activate and release the forward switch or sensor
to change direction.
while in driving mode.
Usage - 15