I'm very new to Affinity so I'm having a bit of hard time. One thing I couldn't figure out is how to export specific slice, and more than that, how to export it to a different scale? I mean, I can export slices throw Export persona (btw I still not understand why are those personas and what are they good for) but I can't choose to export it to larger scale than it is, and the standard export option allowing me only export the whole file or a whole artboard.
Bottom line, I need a way to export specific slice in an artboard to 1300px instead the 200px than it is right now, via PNG. How can I do that without creating another artboard?