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In portrait mode PDF, Epub, Video and interactive content will not suite for portrait screen
Sample screens of portrait mode of PDF, EPub, video and interactive contents
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In PDF and EPub player, font size will show in small. If we increase the font size - horizontal scroll will come, which looks uncomfortable to the reader to scroll horizontally.
V1 and V2 Players supports portrait mode with the above limitations. This can be achieve using the solution 1 which is not depend on player.