Editing images with feh

According to the feh man page: > --edit Enable basic editing of files. This makes rotation and mirroring (bound to "", "|", and "_" by default) change the underlying file and not just its displayed content. So based on my understanding of this, I should be able to use, for example, feh --edit "<" image.png to rotate an image. But when I try this, I get the message

feh WARNING: < does not exist - skipping

And when I try feh --edit < image.png, it opens a different image. Does anyone know how to use the editing features of feh?