Currently, the default zoom level when viewing a page of a PDF file is automatically calculated based on the width of the "widest" page of the document. This means that, if the document contains one page that is wider than the others or is in landscape orientation, then the default zoom, when viewing all the other narrower pages, is set in a way so that the page does not use the full width of the screen. This results in very poor experience, because the zoom level and the visible area of the page have to be constantly adjusted for each page. The latest update (at the time of writing) has added some extra view modes, but not the much needed 'Fit width' or 'Fit visible'.
Personally, I can find no reason valid enough to justify the lack of such a view mode. Automatically setting the zoom level based on the width of the current page so as to take advantage of the full width of the screen should be a must have feature for mobile devices, if not the default behavior. The current default behavior regarding the zoom level is pretty much useless, even on 8"/10" screens. There should be a view mode in which the full width of the screen is always used to display the document.
Examples of documents for which the Adobe Reader for Android provides a poor reading experience are:
- documents which contain pages in landscape orientation.
- publications which contain the full front and back cover in a single page (usually first page) or any other extra documents like cards or application forms (that are meant to be printed) which usually use an A4/Letter page size etc.
- documents which have been cropped by external utilities or scripts so as to eliminate unneeded white margins (in some cases not all pages have the same width).
Please consider fixing the default behavior in future releases of the Reader for Android or add a 'Fit width' or 'Fit visible' view mode.
Thank you in advance.