Reply To: scaling an entire ID document

I think the script Jongware is talking about in point 3 is “multipageimporter2.2.1.jsx” which can be downloaded from this link: https://creativepro.com…..r2.2.1.zip. This is one of the more commonly used scripts that i use as a prepress operator.

The script allows a multi-page PDF OR INDD to be imported into an INDD but treats the placement as graphics, so its not possible to use any of the editing features in indesign to edit the graphic directly in that file, edits have to be done in the original indesign file.

I don't think its possible to do what's being asked in the last para of your post (scale original pages to fit the new page size and still have all editable/controllable objects in indesign) BUT i'm not very good at javascript. Perhaps try https://www.adobeforums.com and then search Indesign, then Indesign Scripting.

The solutions offered by Jongware are the same suggestions that i'd offer you, particularly the first one: let the printer do it. Any printer worth their salt has a piece of software called a RIP (Raster Image Processor) which controls the output of the file, and in the RIP its possible to control the layout imposition, ink trapping, page size, scale, orientation, etc. The RIP my work uses (AGFA Apogee) lets an operator select all the pages in the run-list at once and scale them to 97% proportionally and center the pages.