STEP 4. Edit the knobs to create both styles.

Looking at the completed drawing picture, we see that the knobs are of two different styles. Let's create the knob with the center bar first. Use the Rectangle command again.

Then copy the center bar, which you just created with Rectangle, to the appropriate knobs using the Copy command . Follow the same procedure you used for copying the circle and rectangle in Step 3. Here's what the knobs should look like so far:

Now you need to finish the other knobs, which are created with concentric circles. You will find it easy to line up the inner circles if you use a Snap setting of Center. The Snap setting can be selected by clicking on the down arrow next to the Snap box at the top of the screen. Now start the Circle command. When the program prompts you for the center of the Circle, click on the outside edge of the existing circle. The program will Snap to the center of it. Then change the Snap setting to None and drag the radius of the circle. Click left when you have it sized appropriately. Your final result after drawing in the 3 inside concentric circles should look like the figure below.

Once you have created one completed knob with the concentric circles inside, use the Copy command to copy the circles to the other knob. Remember to set the Snap to Center and click on the edges of the circles. Here's the finished knobs: