Example showing the photospheric contribution being removed from a CTTS spectrum in order to recover the intrinsic [OI]λ6300 emission line profile. The veiled, broadened WTTS template is shown in blue, plotted over the CTTS spectrum in black. Below, the final product is shown, shifted vertically to facilitate a comparison with the original spectrum. We can see that the wings of this profile are recovered after removing the photospheric absorption lines.