I currently read a lot of pdfs with many references to previous formulas, definitions and graphs. These references are useful to look back where the formulas or definitions came from and what they looked like. However, if there is a lot of jumping around in the document, it gets very confusing to always scroll back to where you clicked the reference. My request is a feature where hovering over a reference in a pdf pops up a small window with a preview of what you would see when clicking the pdf-internal link. Something similar to visual studio code's peek definition when working with code or on gitter and github when hovering the mouse over an issue. Another easier idea would be a "return" button, like "drawboard pdf" has, where you can jump to a state from before klicking the reference. However I think the peek functionality is far superior and I couldn't find any pdf reader, that implements this.
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