Comparing Chromatograms
Selecting the Samples and Channels

Different alternatives are available to select samples and channels that are to be displayed as Overlays:

• Display the chromatogram for a sample in an integration window, e.g., by double-clicking the sample name in the Browser.

• Afterward, select one or several samples of a Sequence in the Browser and drag the sample(s) into an open integration window while holding down the left mouse button. The action is indicated by a + sign on the mouse pointer. When you release the mouse button, the chromatogram of the sample(s) is displayed, showing the same channel as for the sample already displayed.

Instead of selecting a sample in the Browser and dragging it into an open integration window, you may also select the sample in the integration view using the Add Overlay command on the File menu. The chromatogram of the first sample will then be overlaid by the chromatogram of the selected one.

Or:

• Select several samples in the Browser and then select Compare on the context menu. The Compare submenu lists all recorded channel types. After selecting a channel, the chromatograms of all samples with raw data for this channel are compared.

Or:

• Select a sample in the Browser, and then select Open > All Channels on the context menu to compare all channels of a sample in a separate window. Press F10 or SHIFT+F10 to display the channels of all samples in a sequence successively.

If several samples are selected, all channels of the first selected sample are displayed. Press F4 or SHIFT+F4 to browse through the selected samples.

Or:

• Hold down the CTRL key and click the Next (or Previous) Chromatogram icon ( or ) to insert the chromatogram of the next (previous) sample.

Or:

• Perform a Query over several sequences or Datasources. Select Compare on the context menu. The Compare submenu lists all recorded channel types. After selecting a channel, the chromatograms of all samples with raw data for this channel are compared.

Or:

• Hold down the CTRL key and click the Next Channel icon () to insert the next channel of the same sample.

• Hold down the CTRL key and click the Previous Channel icon () to insert the previous channel of the same sample.

Chromeleon supports several actions for overlaying chromatograms. For an overview, refer to  Comparing Chromatograms.