In the Spectral Library box, type the path and file name of the library file you want or, to select a file, click Browse.
Spectra-library files have a .spl file name extension.
Note: If a target file is defined, the value appearing in the box is based on the sensor type of the target file. If the target file is not defined, no value is displayed.
Select the spectra you want to add to the Spectra Plotting table, and then click Add to Plot.