A surface book 2 and Microsoft sketchpad do the job really well for a screen share. However, there's skill involved, and you really want that multi touch+pen i

A surface book 2 and Microsoft sketchpad do the job really well for a screen share. However, there's skill involved, and you really want that multi touch+pen input. Zoom in to write text, zoom out to draw boxes, move the canvas around, etc. Also, having a colour pallet, since that's designed into whiteboard markers for you, where digital systems give you a billion bad options