The task of this module is to resize the pdf file. You can specify the size of the TrimBox or MediaBox by specifying a value in mm (all pages in the file will be scaled to the new size, regardless of size, after resizing all pages in the pdf are the same size) or by specifying a new value in % (pages of different sizes in a multi-page pdf continue to be different sizes).
Post-processed pdf files have the phrase "--RS" (Resize) added to the original file name.