Forcing 'Page scrolling' mode by default

[SirClickALot]

I am using a Drupal module that appears to do little more than 'throw' a PDF file at the pdf.js viewer.

I say 'little more' but actually it's doing a perfect job.

Almost...

I just need the viewer to default to 'Page scrolling' mode by default.
Since there does not seem to be any way to effect this using the module, I was wondering if I can create a custom (shaped up) version of this library that does default to that mode.

Thanks

[catmans1]

@SirClickALot
If you're using viewer.js with pdfjs version 3.11.174
You can hide another Scroll Mode in viewer.html
And set Page scroll mode in PDFViewerApplication (Page scroll mode is 3) in your js after the pdf viewer rendered