The -e option selects all of the even pages; it may be used in conjunction with the other page selection options to select the even pages from a range of pages.
The -o option selects all of the odd pages; it may be used in conjunction with the other page selection options.
The -ppages option specifies the pages which are to be selected. Pages is a comma separated list of page ranges, each of which may be a page number, or a page range of the form first-last. If first is omitted, the first page is assumed, and if last is omitted, the last page is assumed. The prefix character `_' indicates that the page number is relative to the end of the document, counting backwards. If just this character with no page number is used, a blank page will be inserted in the output.
The -r option causes psselect to output the selected pages in reverse order.
Psselect normally prints the page numbers of the pages rearranged; the -q option suppresses this.
If any of the -r, -e, or -o options are specified, the page range must be given with the -p option. This is for backwards compatibility with previous versions.