Reference plan context managers in scipy_fft docs
@@ -29,7 +29,7 @@ Fast Fourier Transforms
Code compatibility features
---------------------------
-1. The boolean switch ``cupy.fft.config.enable_nd_planning`` also affects the FFT functions in this module, see :doc:`./fft`.
+1. The boolean switch ``cupy.fft.config.enable_nd_planning`` also affects the FFT functions in this module, see :doc:`./fft`. Moreover, as with other FFT modules in CuPy, FFT functions in this module can take advantage of an existing cuFFT plan (returned by :func:`cupyx.scipy.fftpack.get_fft_plan`) when used as a context manager.
2. Like in ``scipy.fft``, all FFT functions in this module have an optional argument ``overwrite_x`` (default is ``False``), which has the same semantics as in ``scipy.fft``: when it is set to ``True``, the input array ``x`` *can* (not *will*) be overwritten arbitrary. This is not an in-place FFT, the user should always use the return value from the functions, e.g. ``x = cupyx.scipy.fft.fft(x, ..., overwrite_x=True, ...)``.
