Suppose you have a list of QRs and you move down them to locate the right ones (can call it "QR vision", depending on immersion could be "augmented reality"). At least support two columns and two rows. Colour the text windows / frame of ones that have been acted on or 'checked' (instead of blocking as others have thought, since you may change your mind). They all may be a larger document serialised into multiple installments.
Suppose you have a list of QRs and you move down them to locate the right ones (can call it "QR vision", depending on immersion could be "augmented reality"). At least support two columns and two rows. Colour the text windows / frame of ones that have been acted on or 'checked' (instead of blocking as others have thought, since you may change your mind). They all may be a larger document serialised into multiple installments.