Hi,
Some of that is possible currently (page size, overall margin size), but others (specific margin control) isn’t with the way Deeepdwn generates PDFs today.
I’ll keep an eye on requests for this.
How are you using PDF exports currently?
I didn't know page size was possible. The way I export is by opening preview and then save as pdf. I haven't seen any customization options. I would also like to be able to create page breaks for each top level heading. Typora does it and it works well, but I always get quirky stuff with my pdf exports.