Yes, this option is available since version 2.5.0.2. Simply enter the page order needed in the Page Range field. It is even possible to duplicate pages. For example, if you have an 8pp booklet where the outside back cover is page 1, simply enter 2-8,1 in the page range field and page 2 will be imposed as the outside front cover with page 1 as the outside back cover. If you have one blank page as the inside front cover in a 7pp document and you wish to use this page as the inside back cover (giving you a total of 8 pages), simply enter 1-6,2,7 in the page range field.