Clicking on these buttons zooms in or out of the Spectral Graph. This lets you view and edit the noise contour with greater precision. If you have selected a breakpoint or breakpoints, press Alt+Start+Plus (Windows) or Control+Option+Plus (Mac) to zoom the beginning of the selection to the center of the screen. Press Alt+Start+Minus (Windows) or Control+Option+Minus (Mac) to zoom back out.
When there is no selection, the Up and Down arrows move the entire Contour Line up or down by 1 dB, respectively, and the Left and Right arrows scroll the display left and right.
Clicking these buttons moves a selected breakpoint or breakpoints up, down, right, or left. If there is currently a selection in the Spectral Graph, clicking the left and right arrow buttons will move the selected breakpoints left or right. The Up and Down arrows will move the selected breakpoints up or down, respectively. Alt-Start key-clicking (Windows) or Control-Option-clicking (Mac) the Arrow keys on your computer keyboard performs the same function.
Clicking the Undo button undoes the last edit to the Spectral Graph Display. The
Undo button does not undo changes made to slider positions.