Seems you have to pay to see that far down the document
To answer OP question. Front preload will only operate in high mountain setting. Give it a minute or so to work as it's not as quick to work as rear preload. You should see it rise up. Logic says it's worth activating every now and then so it doesn't lock in position
I like using my bike on the high mountains setting. The handling isn't badly affected and on back roads can actually improve with the wheels better following the road surface. Sadly my short legs prevent me doing it in town. It's such a shame the ESA is so slow to change ride height.