Box Cursor

Do one of the following to activate the Box cursor :

Click on the Spectrum toolbar.

Choose Box Zoom Mode from the Spectrum Pane pop-up menu.

Press Ctrl+B.

Use the Box cursor to zoom a spectrum in both the horizontal and vertical directions. Position this cursor on the spectrum, click, and drag to mark the region you wish to zoom.

Note: Autoscaling is switched off when the Box cursor is active.