Export to PDF in order to Artboard Z-index
currently export to PDF is can only be sorted by the left-right, top-down arrangement. Often there are usecases to arrange your artboards in an arrangment other than left-right, top-down, and so would need some other arbitrary way to choose the order of artboards to pages in a PDF. The Artboards panel already can be sorted arbitrarily, so would be a natural fit, if a user could export to PDF with an option to use the order it appears in the Artboards list, and this would also mirror the behavior in Illustrator and Fireworks.
have the same problem for exporting PDF from Xd. It is easy to export with wrong page order. It would be better if Xd could add functions to arrange the page or artboard orders. On this point, sync with illustrator is also a good approach.
Also alpha/numeric order for labelling artboards