The trimming guide is best completed in the order given, particularly doing the airborne checks shown in Part 2 - This keeps the requirement to retrace your steps to alter previous changes to a minimum as you work through all the steps to get the model flying as well as possible.

Although the total guide is aimed at aerobatic models, relevant parts are applicable to all models, so use whichever sections you need.

The airborne checks in Part 2 are in the format of "Fly a manoeuvre.... Observe this.... Adjust that" as shown in the three table columns.
There are notes (in Italiscs), to help clarify some of the check procedures.

Some of the tests do require a bit of practice to be able to fly them accurately enough to make the correct changes, as with all modelling, patience & practice will pay dividends.

Please do all the ground checks shown in Part 1, before progressing to the airborne checks, shown in Part 2!