You can set WinMLS to plot in a specified range, e.g. 100-5000 Hz. In the section above we see that WinMLS plots 40, 50, 63 and 80 Hz. We do not want to include these 4 first numbers
To limit the plotting range, go to Plot->Layout->Advanced... and in this dialog box, make sure the setting is set as shown below.
As explained above we start the range from 4 (since we do not want to include the four first values 40, 50, 63 and 80 Hz. And we end the range at 21, which is the 5000 Hz band.
Remember to store the setup from Setup->Store... if you want to store this setting.
Note: This setting applies for all plot types so if you set the window to display the time data, only points in the range 4-21 will be plotted.