Menu: Diagram→Draw Covariance
Shortcut: F6
This button draws double-headed arrows. Point to one variable and press the left mouse button. While continuing to hold the mouse button down, point to a second variable. Then release the button. This will cause the two variables to be connected by a double- headed arrow. The arrow will be curved, in clockwise direction, depending on which variable was pointed to first.
After you have drawn a double-headed arrow, you can change its shape with . You can move either end of the arrow with .
See also: