PDF reader on iOS - single column mode feature request

I am doing a lot of reading on my iPad in Zotero beta and it is a great reseach tool. Even on the larger iPad though it can get tiring staring at small text all day. Of course I can pinch-zoom comfortably, but I am aware that other apps have introduced solutions for reformatting two-column PDFs (most scientific articles) into a single column to maximise screen width and retain reading flow.
I honestly am uncertain how difficult this is to implement, but I would like to suggest it as a future feature if it is possible.
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