I'm new to Affinity Photo (switching from PhotoShop) - I'm very impressed so far!
I imported an existing PSD file, modified one of the layers, saved the file, then exported it to PDF. I opened the PDF in MacOS's preview app, and the output has extraneous large white lines in it. I've attached a screenshot of Affinity Photo (which looks perfect), and of 2 previews (that show problems). I tried export, export for print and export flatten, and each of the pdfs looks incorrect (though with different looking errors, as you can see below). It looks like the correct data is there, since if I tell preview to show me the thumbnail, it looks good. Is there some specific setting for exporting PDFs that I need to set? I normally work in RGB (as the currently attached images are), and then when ready to sent to the print shop, convert to CMYK - so any settings for export would need to be good with CMYK exports as well.
I've not attached the Affinity photo file, as it is > 80MB, but I can do so if that's helpful.
MacOS 10.12.6, NVIDIA GeForce GT 755M 1024MB
Affinity Photo 1.7.3
Thanks for any help!!
Sandra