World MAP: Unable to zoom in or out with trackball keyboards or anything other than a mouse scrollwheel

When setting up for a flight in the world map, it’s now zoomed to 0 NM and I cannot zoom out. Internet research shows many have this problem. Many flight simmers are not setup on a standard office desk with a keyboard and scroll mouse. We have home cockpits with various controllers and may not have any space for a mouse and desk, hence we use small keyboards or such mounted at different angles.

Would MS please simply add a + and - button on the screen so that the rest of us can use the world map again and zoom in our out using the buttons.

Thank you.