Vilas, there is no need to scribble anything. The primary way of setting the THS as you know is thru the percentage of MAC on the trim wheel to avoid confusion between THS up or down. Writing the THS position in the perf page is a nice reminder but nothing more than that. The main action is to check the % of MACTOW during the after start from fuel pred. Airbus teaches it in the various PDP / normal sop.