I presume that your context is the NeoReader (a/k/a kreader.apk)?
Yeah, it's a tough one one with Eink and sudden paging.
The best would be if the display would have a line or two from the previous page but slightly grayed.
Unfortunately, dividing a page into screens means that the overlap is not necessarily fixed adding to the confusion.
Even on LCD devices scrolling without losing your place is hard. I have an app for song lyrics when I perform and it would kill me to do it on Eink.
I'd like to mention the dotted line option. I have no idea what it is but it appears to annoy you.