Thanks for responding.
My workflow is to break large PDFs into several 'chapters' so that, if I need to heavily annotate, the 'summary' is not too lengthy for later browsing, and I can easily access relevant sections using the summary's link feature. But the summaries still often over-extend the current display limit.
I periodically interrupt annotation sessions to 'Save' (to ensure against loss from unexpected events). When I re-enter the PDF, I want to pick up from the point of the last annotation. As it stands, tapping the last displayed summary annotation leaves me a fair number of pages shy of that point.