BOOKS app “margins control” [IOS & IPADOS]

I have been migrating my epub library over to the native “BOOKS” app, with iPad as the primary device.

Previously used & loved the now-unsupported Marvin3 reader with many configurable viewing option controls. I would like one feature added to the BOOKS app, namely the ability to adjust the page margins when reading an epub.

The default margins on BOOKS are far to wide for my taste; I would like to be able to fit more words on each page. The “Themes and Settings” does not seem to allow margin adjustment. Here’s hoping that this is a simple enhancement that could be added in a future update.

Thanks much, 

Thom Spengler