Setup: Document opened in PDF viewer, zoom at least so large that the page does not fit the screen vertically.
If I press PageDown at the top or in the middle of a page, the viewer scrolls down correctly on the current page. However, if I press PageDown at the bottom of the page, it does not jump to the top of the next page, but to the BOTTOM of the next page.
The opposite direction using PageUp works flawlessly as expected.
I don't see this behavior here. Which version of TXS are you using? Can you post a screenshot to illustrate the issue?
I added three attachment:
<PgDn>
<PgDn>
TeXstudio 2.7.0 (hg 4307+:7e7903c73aac+)
(Although I am pretty sure that the previous version 2.6.6 had this already. Not sure about earlier versions)
fixed (hg 4336 (f74e56aba0b4))