The little question marks
There is help built into the screens. Here is how to find it.
Beside a lot of headings and labels you will see a small ? in a circle. Hover over it, or tap it, and a short explanation appears.
They are there for exactly the moments this School cannot help with — when you are mid-task and cannot remember what Display order does. Nothing is hidden behind them that you need to memorise, so ignore them freely until you want one.