07-25-2019, 05:39 AM
In Half Page display mode (with either Portrait or Landscape orientation) when all of a page is showing and a page turn occurs, the top half of the next page is displayed above the bottom half of the current page. These two half pages are separated by a horizontal bar. The next page turn displays all of the next page and the separation bar disappears. This bars serves as a clear indicator when the page halves are out of sequence and another turn is needed to see the remainder of the page.
This seems perfectly analogous to landscape Two Page display mode when using Alternate Page Turns. Except that the vertical bar separating the two facing pages is the same, whether or not the pages are out of sequence. An important advantage of being able to preview the following half page or full page (besides context) is the ability to tap a page turn at a convenient place rather than suddenly at the bottom of a page. So when the left page is being played in alternate page mode, it may not be remembered or obvious whether another turn is now needed to see the following page on the right side.
Focusing on the music as you arrive on the left page, you may forget to tap again to bring the right page into correct sequence. And then you may not remember whether you have forgotten. Content or page numbers may not be an immediate cue. So I'm suggesting that while the left page is ahead of the right page, this could be indicated by a differently shaded or slightly thicker vertical bar. The slight loss of horizontal screen space shouldn't matter. A much thicker bar separates the two page sides when the overlay is active.
This seems perfectly analogous to landscape Two Page display mode when using Alternate Page Turns. Except that the vertical bar separating the two facing pages is the same, whether or not the pages are out of sequence. An important advantage of being able to preview the following half page or full page (besides context) is the ability to tap a page turn at a convenient place rather than suddenly at the bottom of a page. So when the left page is being played in alternate page mode, it may not be remembered or obvious whether another turn is now needed to see the following page on the right side.
Focusing on the music as you arrive on the left page, you may forget to tap again to bring the right page into correct sequence. And then you may not remember whether you have forgotten. Content or page numbers may not be an immediate cue. So I'm suggesting that while the left page is ahead of the right page, this could be indicated by a differently shaded or slightly thicker vertical bar. The slight loss of horizontal screen space shouldn't matter. A much thicker bar separates the two page sides when the overlay is active.