Javascript to scale age 1 to A4 size

[Nishil5E2B]

Is there a javascript to scale page 1 of the pdf using preflight function to scale to A4 instead of all the pages being scaled to A4 using preflight

[try67]

JS can only execute a Preflight Profile as it is defined. It can't pass any parameters to it, except for telling it to omit fixups and show a progress bar while running. If you can't set the profile to only process a single page then the solution could be to extract that page, run the profile on the new file, and then import it back into the original, and delete the old page.