STEP 2. Draw the outline of a knob.

Start by drawing one of the knobs. Use the Zoom Window button to zoom in on the top of the drawing. Set the Snap to Grid. That will cause the cursor to snap to the grid dots when you are drawing. Then, using the circle command draw a circle in the position shown below.

Place the center of the circle on a grid dot. You do this by clicking on the grid dot when the Circle command prompts you for "Center ?". Then drag the mouse until the box next to "D" at the bottom of the screen reads "0.625". Your circle should look like the one below. The circle is 10 grid spaces in diameter or 10 x 0.125. This is equivalent to a radius of 0.625. Click on NEXT below when you are ready to go to the next step.