This routine performs automatic curve fitting of overlapping lines. It uses a Levenberg-Marquardt fitting routine. The fit function can be Lorentzian, Gaussian or Mixed Lorentzian and Gaussian. Use Options->Line Fit to activate the line fitting procedure. First, one is asked to select a new block to hold the calculated lines. For example, if the spectrum is displayed in block 1, chose block 2 (must be a block with a higher number). -This routine performs automatic curve fitting of overlapping lines. It uses a Levenberg-Marquardt fitting routine. The fit function can be Lorentzian, Gaussian or Mixed Lorentzian and Gaussian. Use Options->Line Fit to activate the line fitting procedure. First,　one is asked to select a new block to hold the calculated lines. For example, if the spectrum is displayed in block 1, chose block 2 (must be a block with a higher number).