Ocean Optics Overture - Manual (Page 21)

Chapter 2: Overture Software Icons and Menus
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Zoom
Zoom In lifts the highest peak to the full y axis scale.
Zoom Out cancels this.
Wavelength Range allows you to set both the x and y ranges you want to display. Numerical zoom
can be used in all windows. It is useful to set the wavelength minimum to 400 in Absorbance and
Transmission modes to eliminate the noisy signal that can often be seen at the short wavelength end of the
scale.
Open Spectrum
You can open up to two graphs at the same time and to show two different views, for example,
Absorbance and Transmission at the same time as shown below.