Why does Astropad only mirror the screen?
Due to limitations in macOS, Astropad is only able to mirror the screen. However, we recently introduced a new hardware companion called Luna Display to address this issue. Luna Display uses hardware support to provide a fully graphics accelerated 2nd display on the iPad.
This can also allow second display support for Astropad when used together.
More info on how Luna works with
This solution also helps when using Astropad, by properly adjusting the screen aspect ratios and/or resolution for the iPad side.
Our Kickstarter has ended, but pre-orders are available here via www.lunadisplay.com