As I'm now using Win10 to run Mach3 with external motion controllers I'm wondering about using a touch screen (as mentioned in another thread).  My son told me of a couple of iPad/PC apps that can make an iPad operate as an extension screen for the PC, and as I have an old iPad lurking somewhere this looks interesting.  However the solutions aren't free so before I tried one out I just wondered if anyone else had tried this and if it worked please?  An example is

https://www.duetdisplay.com/