Vanderlei Debastiani

Dear, My first post here. I have several artboards in a single file in Affinity designer. Those artboards (a lot of cards, each unique) are small size and I would like export more that one card in a single A4 page for printing (preferably aligned and optimized for cutting and printing). In Affinity Publisher I can convert the dartboards to Spreads but I don't know how to proceed. Can I do this automatically with some export adjustments? Thank in advances. Best, Vanderlei