You are using a touch pad instead of a mouse and you want to reverse the scrolling direction to have natural scrolling - with the screen content moving synchronously to the fingers' movement on the touch pad.
There is no "reverse scrolling" parameter in IGEL setup.
- Open the device's configuration either locally or in UMS.
- Go to System > Firmware Customization > Custom Commands
- Go to Custom Command Desktop Final
- Enter new command:
echo "pointer = 1 2 3 5 4 6 7 8 9 10 11 12" > ~/.Xmodmap && xmodmap ~/.Xmodmap
Save the settings and restart your device.
This will reverse the scrolling direction of a mouse wheel as well. Swapping 4 and 5 will reverse vertical scrolling, swapping 6 and 7 will reverse horizontal scrolling as well (if supported)