With setting the view of PDF file as fit to window, any 2 consecutive pages are displayed at consuming around 50% of the screen. whenever we user create any bookmark at the lower part of the first of these 2 consecutive pages. For example, p.100 and p.101 are showing simultaneously, i.e. bottom part of p.100 is showing at the top 50% of the computer screen. However, the page no, showing in the menu bar had became p.101, i.e. any bookmarks to be set at this bottom part of p.100 do not connected correctly. Please refer to the attached video for details.