Chapter 2 Using Chromatogram and Spectrum Windows
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To change the active trace in an overlay:
1.From the Display menu, deselect Overlay.
2.Click the trace to activate.
3.From the Display menu, select Overlay.
When you display overlaid traces, you can sequentially
activate each trace by clicking 
and 
.
NOTE: If you overlay processed spectra, and then display a different spectrum number, the processed spectrum is lost. For example, assume you smooth Spectrum #3 in a trace, then overlay it with another trace. If you select Spectrum
#3, then click to display Spectrum #2, then click to return to Spectrum #3, Spectrum #3 is no longer smoothed.
To set overlay attributes:
1.Display the individual traces to overlay.
2.Select Graphic Options from the Display menu.
The Graph and Plot Options dialog box is displayed.
NOTE: If traces are overlaid when you select Graphic Options, you can set attributes for the active trace only.
3.Click View Setup.
4.To apply the graphic options to all traces, select the Use same settings for all traces check box.
NOTE: If the Use same settings for all traces check box is selected when traces are overlaid, the attributes are applied to the active trace only. When you display individual traces again, settings are applied to all traces.