Overlay & Other

Includes commands for working with several chromatograms simultaneously. The maximum number of displayed chromatograms is practically unlimited, the actual limit can be set in the User Options dialog. Most of the commands identified below can be invoked by the icons found in the Overlayand Other toolbars.

Overlay & Other Toolbars

Move Moves the active chromatogram.
Scale Scales the active chromatogram up or down.
  Original Cancels all shift and scaling operations.
  3D View Displays chromatograms in a three-dimensional perspective.
  Clear 3D Restores the original perspective.
Properties… Opens the Graph Properties dialog on the Signals tab.
Mathematics… Performs mathematical operations with chromatograms.


The Overlay mode can be activated using the File - Overlay Mode command, double-clicking on the Overlay inscription in the status bar or clicking on the icon. An active OVERLAY mode is indicated by the depressed icon in the Overlay toolbar, highlighted Overlay inscription in the status bar and by the checkmark by the Overlay Mode in the File menu.


Too many chromatograms opened at once may (especially on slower computers) notably slow down the response of the computer.

In case there is more than one chromatogram (or a chromatogram with more than one signal), it is possible to hide signal by holding CTRL down and clicking on the respective colour in the toolbar. Hidden signals are represented by empty rectangle in the Overlay toolbar (see image below). To once again show the signal, simply hold CTRL down and click on the hidden signal. Alternatively see the Chromatograms topic.

Overlay with hidden signals