Integrate absorption and emission spectra

a) Calculate area below entire spectrum
Press the Integrate button in the toolbar, without selecting any spectra using the data cursor tool. The area of all plotted spectra will be shown in the message board.

b) Calculate area within wavelength interval
If instead the area within a certain wavelength interval is wanted mark the data interval using the data cursor tool:

1. Activate the data cursor tool in the toolbar and position the data cursor at the left and right boundary of the integration range. For multiselection press down the Alt key.

2. Now press the Integrate button in the toolbar again. This will integrate the marked spectrum in the specified interval and show the results in the message board.