Regarding thumbnails - I see that you can change the image that appears when thumbnails pop up in an app:
– Pages Thumbnail Mask: the Table of Contents Menu is a Scrollview at the bottom of screen with a print screen of the page as thumbnail of the page. You can customize its aspect by inserting here your preferred image as mask.
But is it possible to remove the thumbnails altogether? We're finding that when you try to interact with the page, any errant tap is bringing up the thumbnail overlay instead of just remaining on the page.