Stretch the document to the full page when you open it.
When I open the document, I want it to stretch the entire width of the screen, as if double-clicking.
How to do it?
The default behavior of the single/dual mode is to fit according to the screen height, so that you do not need to scroll vertically to view the whole page.
To fit the page according to the screen width, you need to comment the following line in PDFLayoutDual.vLayout: