I've had a photosmart printer for 3 years and never had problems printing 4x6
borderless things..pictures, postcards, etc. Under the printer's printing
features tab there is a place to check borderless, and that's what it does.
Of course, in Publisher I use a 4x6 page size and cover the entire thing with
the design/information/etc. It prints fine, and I make sure the Publisher
document and the printer are both set to the same orientation...portrait or
landscape. Shouldn't be a problem. But one reply mentions a set of four, i
guess perforated, postcards....if you have a photosmart printer, you can use
them individually in the 4 x 6 tray. I do not know if my way of doing this
would work on a 4-part thing like that, because the margins would be read
differently. Can you print one at a time like photos?