Pa 28 xplane11 how to refuel

[BA44]

Hi
I am new to the community, I need to ask your help how can I refuel the PA28 161 just flight xplane11, I am having difficulties the arrow to access the various things for for it is at the far corner right on the top of the xplane11 menu bar but I managed to click it and access it but when i click on fuel, it cimes up as fuel auto, no fuel is loaded on board.

Many thanks