// This macro demonstrates two different // ways to create an annular selection. x = 125; y = 125; radius= 75; // outer radius width = 20; // First method. Create a circular selection and subtract // from it by holding down alt key. makeOval(x-radius, y-radius, radius*2, radius*2); radius -= width; setKeyDown("alt"); makeOval(x-radius, y-radius, radius*2, radius*2); wait(2000); // Second method. Create a circular selection and add // to it using the Edit>Selection>Make Band command. radius= 55; // inner radius makeOval(x-radius, y-radius, radius*2, radius*2); run("Make Band...", "band="+width);