I have gone back 20 or 30 pages and do not see this issue, so sorry if it has been discussed previously. Occasionally, I will be wandering around either the Internet or other app. Suddenly the app icons and everything associated with the screen double or triple in size. I understand squeezing and expanding the screen to resize, but when this unwanted resizing occurs, I can do nothing about it and have to shut down and reboot the ipad. Any thoughts?