[Therion] Position of map on the paper in export

Hi folks Is there any possibility to position the map on a different point on the output paper? Or can you resize the output in a way that not so many white spaces around the map is print? I'll try to describe my problem: I'm using: export map -fmt pdf -proj plan ... -layout ... In the layout: size 22.2 18 cm page-grid on I get a paper where a lot of white space is around the map. If I switch on the page-grid I can see the map printed on 24 pages (3 rows and 8 pages each). But if the map would be a bit more in the lower left corner it only would be 2 rows and 7 pages, so in total just 14 pages. Thanks for your help. Torsten