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-to-fit-best and -scale-to-fit-minus are similar, but will rotate a page by
or
respectively on any page where doing so would maximise the scale.
The scale can optionally be set to a percentage of the available area, instead of filling it, when using any of the three operations.
The -scale-contents operation scales the contents, leaving the page dimensions unchanged. The position of the scaled content in the output can be specified using the same postional operators used when adding text (See position).