Exporting or Saving an Artboard with different dimenions
I am on a Mac, with Illustrator 28.2
I have a file with multiple artboards. Some of them are intended to be thumbnail views of the main artwork. I would like to save them as PDFs as say US legal size, but they are saved at the full poster size. I can't see a way to change the saved size. Ican't see an easy way to change the size using export-as. I have tried using Mac Preview and Adobet Reader Pro as well but can't see how to change the dimensions of a PDF.
Any ideas?

