Now that straight lines are in the tab, they need to bring curves and circles. You were able to make straight lines with a ruler. But you can never draw a circle or a curve (at least one that looks nice). As someone who uses rM2 for my college that would be amazing
Do you mean a black background? I made one in affinity designer on my iPad and just exported it to reMarkable as a pdf. Also did some grey ones 59, 60, 70, 80 and 90%. Easy enough to do in any vector based app