To draw a rectangle follow these steps:
Open the "Elements" menu and its "rect" sub-menu. Click on the icon "Rectangle" to activate the function.The icon is framed by a dotted line to show that it is activated. The function displays the message " Digitize the rectangle by top left and bottom right corners. "
Click the first point
Click the second point, you can point each point separately or continuously as with a pencil.
Drawn rect is selected and the floating menu shows available editors to apply on it.
See also draw rectangle showcase for an interactive demonstration of how to draw a rectangle.