Apologies if this has already been addressed. I have searched the forum, but not seen anything about this specifically:
I exist in the metric world and regularly use the page size 229x305mm (as do all publishers I work with). I set my project up with said dimensions and it exports the PDF as 228.6 x 304.8mm (the mm equivalent to the 9x12 inch page size from which 229x305 is derived). I get that I’m splitting hairs over <0.5mm difference, but can I stop Dorico from overriding my project dimensions at print mode?