The -scale-to-fit operation scales each page in the range to fit a given page size, preserving aspect ratio and centering the result.
The scale can optionally be set to a percentage of the available area, instead of filling it.
The -scale-contents operation scales the contents about the center of the crop box (or, if absent, the media box), leaving the page dimensions (boxes) unchanged.
To scale about a point other than the center, one can use the positioning commands described in Section . For example: