When creating a start, end, direction arc, the onsurface command doesn’t seem to work.
I start the arc via the standard menus, and then when I want to select the end, I type onsurface in the command line, which then asks me to select the surface. What happens then is when I click, the arc command immediately jumps to the direction, and skips the end selection.
(Also, whenever I want to snap to a surface, I have to look up this thread. This command, and the way it is done, is really impossible for a new user. Why isn’t onsurface an option next to all the other snap options?)