① Right-click on the body at the desired coordinates > Select the active body.
② Left-click on the surface with the desired coordinates > Select Create Sketch.
③ Create a point by left-clicking > left-click on the location where you want to find the coordinates to plot the point.
④Left-click on “Measure” > right-click to display the coordinates.

ハカセ
Furthermore, if there are no objects in the space, generate new objects and display their coordinates!
It's quite difficult just to display coordinates.

はてなさん

ハカセ
That's right. But once you get used to it, you'll be able to display it in about 10 seconds.