The Spectral Plots panel contains a list of all existing spectral plots and the time series data sets that those plots use. To create a spectral plot, drag a time series data set object from the tree browser onto the Spectral Plots node in the tree.
A spectral plot, or periodogram, is a graphical representation of the power of the data as a function of frequency, where the power is the absolute value of the FFT of the data.to generate additional plots.