When 2-D elements overlap, their display priority determines which is in front. The first element you draw is displayed behind all other elements—it has the lowest display priority. A newly created element is displayed in front of all other elements—it has the highest display priority.
For example, if you draw a circle, then an ellipse, and then a rectangle, the circle is displayed in back. The ellipse is displayed between the circle and the rectangle, and the rectangle is displayed in front.
Changing the Element Display Priority
You can change an element's display priority by pulling it up one position, pushing it down one position, sending it to the back, or bringing it to the front. One click on the striped box changes the display priority.
You can change the display priority of a group the same way. The display priority of elements within the group does not change.