The Ellipse Select Tool can be used for elliptical (including circular) selections. For example, you can use it to select rounded objects such as balls.
Select Ellipse Selection from the Tools menu.
Position the Ellipse Selection to the top left hand corner (A) portion of the area that you want to select.
Click and drag from the top-left corner (A) to the bottom-right corner (B) of your desired element. While you drag, the ellipse dotted line selection outline appears. Hold
Shiftafter starting, the selection will constrain to a circle.
Release the click (and
Shiftif it was pressed) once you have captured the elliptical region you want to select.