The symbols used for inequalities are ... y\) is less than (<) 2, which means an open circle at 2 must be used. \(y\) is less than 2, so an arrow below the values of 2 must be drawn in.

Select the circle, then click Insert. The Symbol is inserted into the textbox. Move the text box over the number that you want to be circled; the circle symbol will move with it. If you want to ...