[Solved] First object selected/highlighted
1) In EV draw an object. It can be a point, or you can input x^2+y^2=1. With the move tool drag the mouse making a square that doesn't contain that object. Then the object is selected. If there are other objects and you repeat the experiment, the first object is selected.
2) Unselect all. Choose any transformation tool (except the translate tool). Then the first object in the EV is highlighted (but not selected). This behavior is a little bit confusing.