stairman

I used to produce posters of any size in Drawplus using the tiling setting in the Print facility. I cannot find any such setting in Affinity Design. How can I produce posters of any size with a tiling margin of 10mm? Printing in Affinity does not align at page edges even if I print borderless. The only way I have found to achieve this is to copy sections of my poster onto individual new single pages that create a tiling margin - a total waste of time. Anyone know how to?