Chapter 3 Peak Detection and Labeling
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If a user label is not displayed or is displayed incorrectly, possible causes are:
•User labels are not enabled.
•The peak does not fall within the specified Tolerance.
•The label is too long or peaks are too close together. If there is not enough room for the label to be displayed, the label may be suppressed. Zooming the region of interest expands the trace and may allow the labels to be displayed.
To display labels when peaks are close together, select Allow overlapping peak labels, or change Orientation to Vertical or 45 degrees in the Peak Label dialog box.
•Peak filtering is enabled, and only peaks that meet the peak list filtering criteria are labeled.
•Filter Width is set too high to detect the peak.
•If you have Match Charge State enabled for spectrum user labels, the peak of interest does not have the charge state specified in the user label.