Hey, In Designer it is already very easy to change Artboard background/canvas color with color wheel to differentiate white shapes from the background. Though, Before exporting you have to change the canvas color back to transparent if you want to export shapes without background. My request would be to add option in export persona to leave modified artboard canvas color out of exported image. This way I could work on artboards with gray/black canvas but export multiple artboards without background. This can already be done by using rectangle shape underneath your artboards, but as you make new artboards you have to rescale the rectangle to fit all artboards inside. It is just a minor inconvenience and the rectangle looks silly filling the gaps between artboards.