+1 Being able to draw circles, squares, lines and rectangles by defining their size would be very helpful. Right now we need to count grid squares while using the Rectangle, Ellipse or Polygon tools, and we don't always want to use the grid on our maps. Also, drawing circles with the ellipse tool is cumbersome since you need to define the circle by drawing its bounding square, which is not always convenient; having the option to draw circles by defining the center and radius would be much easier.