The Frequency to Time FFT () study step, which you can add to a study where the last study step is typically a frequency-domain study, performs an inverse FFT (or, alternatively, the nonuniform Fourier transform) from the frequency domain (input) to the time domain (output). As the default solver it adds an FFT solver. The Settings window has the following special section:

From the Input study list, choose the study from which the FFT takes its input data (the list contains frequency-domain studies and the name of the Time Dependent study that correlates to Current). You can also choose Current to take it from the same study as the one that includes the Frequency to Time FFT study step. For the remaining settings, see FFT Solver, which takes the settings from this study step by default.

The contents of this section are similar to other Values of Dependent Variables sections, but it does not include any settings for the initial values of variables solved for.