Use Normalize to change the Y-axis scale of the selected spectra to a “normal” scale in which the Y values of the data points range from 0 absorbance units for the lowest point to 1 absorbance unit for the highest peak (for an absorbance-like spectrum) or from 10% to 100% transmittance (for a transmission-like spectrum). These normal scales are typical of spectra in commercial spectral libraries.
After you normalize the scale of a spectrum, you cannot use it for quantitative analysis unless you know the scaling factor and adjust the quantitative results accordingly.
To normalize the scale in the desktop interface, from the Spectra view, go to Process > Normalize.
To normalize the scale in the touchscreen interface, from the Spectra view, open the main menu and select Spectral Corrections > Normalize Scale.