Ocean Optics Dragon - Manual (Page 20)

Chapter 3: Quantum Software Icons
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Zoom
Zoom + lifts the highest peak to the full y axis scale. Zoom—cancels this.
Numerical zoom allows you to set both the x and y ranges you want to display.
It is useful to set the wavelength minimum to 400 in Absorbance and Transmission mode to eliminate the
noisy signal that can often be seen at the short wavelength end of the scale.
New graph
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.