FFT line intensity profile shows units in [nm] rather than [1/nm]

When taking intensity profile in one dimension after extracting FFT from HRTEM image (DM3 file), I get the scale in [nm] rather than [1/nm]. Firstly, it doesn't make sense to show the same units in both real and reciprocal space. Secondly, any suggestions on how to convert [nm] to [1/nm]? haven't found an efficient way to do so because the number of pixels from the sub region that I choose in my HRTEM image and the number of pixels in the FFT image is not necessarily correlated.

Thanks.

The issue names no source files, tests, or entry points. Start by reproducing the FFT intensity-profile behavior with a DM3 HRTEM image and inspect how spatial calibration is carried into reciprocal-space profiles. Done means the profile uses reciprocal-length units such as [1/nm] and handles the selected subregion's pixel dimensions correctly.

Written by the indexing model from the issue text.