This tutorial shows you how you can create straight lines and circles with GIMP (Gimp – Open source image retouching and editing tool.). A straight line can be drawn using the Shift key, instead of relying on the imprecision of the mouse. A perfect circle can be drawn by setting the aspect ratio of an ellipse.
Let’s start by creating a new file. Open up Gimp, A window titled GNU Manipulation Program as seen below should pop up.