From page 32 of the instruction book:
"If you press the stitch width button while doing straight stitching, the stitch width light will go on and the indicator screen will show "C". Your needle is in the "Center". If you press the "+" button, the indicator will show "R" (Right). If you press the "-" button, the indicator will show "L" (Left).
Hope that helps.
camkids4, May 2009