Using Keyboard Shortcuts in the Chromatogram

Often, it may be necessary to display specified chromatogram areas only. In this case, use the mouse to zoom to the area. In addition, keyboard keys and key combinations are supported for user-friendly operation. These keys refer to the number and navigation area on the keyboard.

Scrolling

<¬> = <LEFT> scrolls all chromatograms to the right; <®> = <RIGHT> scrolls them to the left. If you press the respective key, the chromatogram is scrolled by 5% of the window width.

<ARROW UP> (<ARROW DOWN>) scrolls the active chromatogram plot up (down). If you press the respective key, the plot is scrolled by 10% of the plot height.

 Tip: 

Scrolling beyond the chromatogram limits is supported for both cases.

<HOME> (<END>) brings you to the first (last) datapoint of the active chromatogram. The entry is ignored if the chromatogram is already displayed in full-size mode.

Zoom/UnZoom

Press <x> (MULTIPLY) to zoom in horizontally by 20%. The anchor point is the center of the time axis; for example, 0.0 to 10.0 min > 1.0 to 9.0 min.

Press <÷> (DIVIDE) to unzoom horizontally by 25%. The anchor point is the center of the time axis.

Press <CTRL><x> or <CTRL><÷> to display all chromatograms in full size. This action corresponds to an Autoscale of the time axis.

Press <+> (PLUS SIGN) to zoom in vertically by 20%. The anchor point is 10% of the signal height because the baseline region at the beginning or end of a peak is usually more interesting than the course of the peak at its maximum; for example, 0.0 - 100.0 mAU > 2.0 - 82.0 mAU.

Press the <-> (MINUS SIGN) key to vertically unzoom by 25%. The anchor point is near the baseline as described above.

 Tip:

If the unzoom operation is performed after the zoom operation, the original chromatogram view will be restored.

Press <CTRL><+> or <CTRL><-> to autoscale the active chromatogram.

Press <NUM5> to autoscale the time and signal axes in all currently open plots. This operation corresponds to the Full Size command on the View menu.

Peak Selection

Press <CTRL><¬> to select the previous peak of the active chromatogram. If no peak is selected, the first peak of the chromatogram will be selected.

Press <CTRL><®> to select the next peak of the active chromatogram. If no peak is selected, the first peak of the chromatogram will be selected.

Press <CTRL><HOME> to select the first peak of the active chromatogram.

Press <CTRL><END> to select the last peak of the active chromatogram.

 Tip: 

If the newly selected peak is outside the current view, the peak is automatically scrolled into the view.

Chromatogram Selection

The following keys are available for chromatogram Overlay:

Press <PAGE UP> or <CTRL><ARROW UP­> to activate the next upper chromatogram; that is, the chromatogram whose caption is found above the active chromatogram.

Press <PAGE DOWN> or <CTRL><ARROW DOWN> to activate the next lower chromatogram; that is, the chromatogram whose caption is found below the active chromatogram.

Chromeleon supports many additional " quick access" keys. For a summary of the most important keys, refer to the table in Basic Operation  Quick Access Keys.