Method of Operation¶

Zooming in/out and Resetting the Chromatogram

You can zoom in the display area by dragging with the right mouse button.
If a straight line is displayed by dragging it horizontally,
RT region will be zoomed in to the line range, while intensity range will be adjusted so that the maximum intensity within the RT region will be the maximum value displayed.
If a square guide (Rubber Rectangle) is displayed when dragging diagonally, the area within the guide will be zoomed in.
You can also zoom in/out by turning the mouse wheel back and forth.

To reset the zoomed area, double-click the left mouse button outside the peak area.

Moving the Chromatogram

When the chromatogram is zoomed in, you can move the display area by dragging the left mouse button outside the peak area.

Selecting a Peak

You can change the selected peak in the selected sample by left-clicking on the peak area or the inverted triangle above the peak top.

Making a Peak 1 - by Manual Editing

When you move the mouse pointer close to a line segment on the chromatogram outside the peak area, a chip will appear showing the position on the line segment.
While the tip is displayed, hold down the left mouse button and drag it to a different location on the chromatogram line until the tip is displayed.
Peak area candidates will be displayed as you move the mouse. Releasing the mouse button will confirm the peak area.

When the mouse pointer is in the Chromatogram window and you press the Ctrl button, a dotted crosshair guide will appear.
This guided peak detection to designate the range of a peak is enabled by holding down the Ctrl button and pressing and dragging the left mouse button.
This method may be easier to operate in situations where it is difficult to display the chip at a specific position on a line segment of the chromatogram,
such as when the chromatogram fluctuates in small increments.
By performing the drag operation in the vertical direction, it is also possible to specify a range above a certain intensity as peaks.

Making a Peak 2 - Using Peak Detection Algorithm

Move the mouse pointer to the place you want to recognize as a peak, hold down the Ctrl button and press the left mouse button. According to the peak detection parameters set in Dashboard, a peak including the peak top near the clicked position are detected.

Editing a Peak

When you hover the mouse pointer over the endpoint of the peak area, the endpoint tip will be highlighted. With the tip highlighted, press and hold the left mouse button and drag to move the endpoint position of the peak.

Deleting a Peak

When you hover your mouse pointer over a peak area, a trash can icon will appear above the peak. Click the displayed trash can icon to delete the peak.
Move the mouse pointer to the center of the peak area, hold down the left mouse button and drag it to the bottom, a trash can icon will appear at the bottom of the peak. Drag to the trash can icon and release the mouse button to delete the peak.

Splitting a Peak

To split a peak, click the Control Mode Button (arrow icon). Then the control mode will change to the Split mode (scissors icon). In this state, when you move the pointer over the chromatogram, a vertical dotted line will be displayed. By clicking the left mouse button at the position where you want to split the peak, the peak will be split at the vertical dotted line position. Alternatively, while holding down the Ctrl and Shift buttons at the same time, it operates in Split mode.

History Function

The chromatogram edit history is saved until you close the project or run reanalysis. By moving the mouse within the drawing range of the chromatogram, undo/redo buttons will appear in the upper right corner. You can go back to the previous state by clicking the undo button, and go forward to the next state by clicking the redo button. You can also undo with Ctrl+Z and redo with Ctrl+Y (or Ctrl+Shift+Z).

When you execute Parameter Based Detection or Supervised Detection from the Dashboard, the editing history up to now is saved as a snapshot, and the history on the Chromatogram window will be deleted. For details, please refer to Peak Operations on the Dashboard.