For Reader Spread we have a term and definition in Page Layout and Typography.

A term used in page layout software to describe the pairing of pages on the computer display. Pages are grouped in numerical order as a reader would encounter them while reading: 2 paired with 3, 4 paired with 5, etc. This is contrasted to printer spreads which describe the pairings as they may occur on a printing press before the binding of the book.
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