This option allows you to specify which pages you want to convert.
Page Ranges can contain individual pages (1, 5, 14, etc)
Or they can contain ranges (1-5, 4-10, 7-, etc).
These can be combined using commas or spaces to specify non-continuous ranges as in '1, 5-10, 17'.
Special ranges are also supported for all, even and odd, these special ranges cannot be combined with other ranges.