Join and split individual pages in the PDF editor
Join two pages horizontally/vertically or split a page into half or into 4 parts; this feature can be found in some PDF editors such as Foxit and is very useful
It is planned in one of the future releases.
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Manfredi commented
Sorry that I didn't answer. An example of free software that can merge and split individual pages is PDF Arranger (https://github.com/pdfarranger/pdfarranger). Splitting is essentially duplicating + cropping the resulting pages, thus splitting the original content horizontally/vertically across two or more pages.
Joining instead produces a wider (or "taller") page in which the content of the original pages is placed side by side horizontally or vertically according to the number of rows/columns specified. -
AdminConstantine
(Admin, ONLYOFFICE)
commented
Can you provide a link to the documentation that describes this process?