[Gretl-users] automated frequency histograms plotting and saving

Hello, I was wondering if there exists an (undocumented) option to save freq. histograms to the disk as, say .png file. I can use the" --show-plot" option in a loop and then manually save the figures thus created (even save them as icon and manipulate them). But is there a way to save them to a file like it is possible with scatters and boxplots? I.e. something like an "output=" option and perhaps even a way to pass additional arguments via { set ... ; } ? Many thanks as always Frederik Schaff