I have configurated my notes so that the page are at A4 format. When I reach 200 pages, the stylus starts lagging, zigzagging and not responding.I tried another application to see whether its my stylus problem or not, but the stylus works properly on the other application. So it's squid problem. Try to improve the responsiveness of the notes when they have a lot of pages.200+. When there are fewer than 200 pages it works properly.