[Zubersoft]

The jump is most likely the app hiccuping when it loads a new page and renders it. I will need to investigate what I can do to lessen the burden on the primary thread when a rendered page becomes available in the background. If you switch the battery power mode to "Best Performance", that should significantly help with that jumping though. There is an option in the display settings dialog to remove gaps between pages.

As far as the page jumping when annotating, you need to turn off the option that forces the single page display mode (I'm assuming you have that enabled in the annotation settings). Normally, if you enter the annotation mode, nothing changes and it displays the page exactly was it was shown in the normal viewer. If you are forcing the single page display mode, that is going to cause the page to be re-rendered under a different display mode and the page will be laid out aligned based on the display alignment settings.

Mike