Any marks on the target, i.e. writing on the target with a sharpie, can throw off the scoring algorithm. Or worse, if the mark is made over the alignment shape in the middle of the target, will destroy the geometry of the alignment shape making any target image impossible to reconstruct.
Do not make any marks on the target. If you do have to write on the target, only do so after a high quality photo has been obtained and confirmed inside of Orion.