Odpovím si sám : neumí. Viz Reddit
https://www.reddit.com/r/krita/comments/3xeshk/krita_printing_problem/
7 yr. ago
Hi!
As one of Krita's developers, I've often felt we should remove the print option from the menu. The feature just isn't finished properly, which makes it almost always impossible to properly print your image directly from Krita. It's one of those things that needs a good, solid two months of work to finish and we never had that time available, unfortunately.
My advice would be to download Scribus (http://www.scribus.net/) which is also free software and use that to create a page with your image and print it. Scribus is really rather awesome software, well worth investigating.