Currently, when you draw a circle it's fitted to an imaginary designated by your cursor. This makes it quite difficult to draw a circle that's centered around a fixed point, because it's center point moves as you expand the circle. Since many games have effects where players need to draw out a circle of a certain size to show where/what their ability is effecting, it would be useful to add a button that turns on radial draw for circles (and possibly squares too). When this button (perhaps r) is held, the first point you click on would act as the center of the circle and the second part would then be a point on the circumference).
