Here are three way to create two circles with each other in Illustrator CS5. The systems should be valid in CS4 and some earlier versions.
Use the select tool, make sure the "smart guides" ar on (green little text and lines which appears when drawing), select the small circle with the "select tool (a blue square appears), drag manually the smaller circle towards the larger circle, position it inside the latter until the smart guide shows "center".
STEP 1, use the select tool
Use the align window
Select both circles either by holding and dragging both circles with the "select tool" or by using the SHIFT click to select both individually (click on a circle with the select tool, then hold the SHIFT click and select the other circle)
Use the scale tool
Where is it? here:
Ok, here you must also use the ALT key along with the tool. Hold ALT + click with the scale tool. A new window appears and use the highlighted buttoms and parameters.
Why are these exercise useful for my stencil and clip art projects? What's the result?
Well check it here!