Display range selection
The Range selection is located in the lower menu bar.
Use it to select the visible frequency range for the display.
Beside the three ranges  Low,  Mid and  High you can select a fourth setting, which is called User.
You can change the border of the user setting either (like the borders of the three other settings) at Setup → Post Process or by assigning the currently used borders using the Assign current range option.
The  Full range function restores the full frequency range.
If a transfer measurement is performed in the MAT module then this menu contains the Linear Scaling (X-Axis) option, which activates a linear scaling of the frequency axis, opposite to the commonly used logarithmic scaling. The linear scaling might be helpful when you work with the phase trace.
		
Logarithmic (default) frequency scale	Linear frequency scale	

You can also use the right mouse button to select the frequency range you want. Just move the cursor to one end of the desired range, click and hold down the right mouse button. Now you can select the frequency range by moving the mouse to the right or to the left. A dashed rectangle marks the current selection. The display changes to the new values as soon as you release the right mouse button.
	Show Range at Cursor
You'll find this setting in the popup menu of the trace display in the FFT and MAT module.
This option shows two lines with the selected distance related to the amplitude value at the current cursor position.
If you’ve enabled the Pink spectrum lines option in Setup → Display (see page Error: Reference source not found) then the grid will contain lines showing the -3dB slope.
The horizontal grid option shows a horizontal line at the cursor's intersection with the selected trace.
Hints:
•	The cursor always shows the values of the currently selected trace.
•	You can select the trace to analyze in the popup menu of the trace display using the Show Values of option.
	The popup menu assigned to the trace display
Open this menu by clicking on the trace – display window with the right mouse button or by pressing the key J on your keyboard. The content of this menu varies dependent on the current status and the measurement selected.
•	Show values of select the trace whose values are shown. See page Error: Reference source not found for details.
•	Group-delay related to select the reference time used for the calculation of the group-delay. This option is available only in the impulse response's FFT module.
•	 Invert live trace flip the live trace on the zero dB line. The shortcut is Shift + I.
•	Full trace display show the whole valid frequency range. The shortcut is F.
•	Information show information about the currently selected trace.
•	 Show Range at Cursor draws horizontal guide lines related to the value at the cursor's current position.
•	Delay = Cursor applies the delay value at the cursor's current position to the current delay. This option is enabled only in the impulse-response measurement. You can also use the shortcut F3 to invoke this function.
•	 Marker open the Menu Marker. See page Error: Reference source not found for details.
•	Tools invoke the Tools menu (see page Error: Reference source not found).
•	Layout opens the layout-sub menu. See page Error: Reference source not found for details.
•	Open Delay Finder open the delay-finder window. Available in the MAT module only. See the delay-finder section on page Error: Reference source not found for details.
•	Low-Frequency Delay-Finder executes the Low-Frequency Delay calculation tool. See page Error: Reference source not found for details.
•	Addition of Signals open the menu for the addition of signals tool.
•	Show Virtual EQ show or hide the Virtual EQ’s trace. See page Error: Reference source not found for details.
•	Target Amplitude shows/hides the Target Amplitude. See page Error: Reference source not found for details.
	Smoothing
This selection is located on left side in the lower menu bar.
Select the amount of smoothing applied to the live trace.
The value of a point for the display is calculated as the mean value of the selected range.
If, for example a range of one octave is selected, then the mean value is calculated from the frequency of the current point minus half an octave to the frequency of the current point plus half an octave.
Using the unit octave is closer to human hearing as a fixed frequency range or a fixed amount of points.
The option Similar to Ear varies the width of the smoothing depending on the frequency. The higher the frequency, the smaller the window (in octaves).
Hint:
•	Human hearing is very sensitive to peaks in frequency response so you should not apply too much smoothing.