"Properties" is quite a vague term, whose meaning depends on the context. But you've mentioned PNG files, so you presumably mean that you want to modify Exif data. I don't recall doing that from Perl, but there seem to be a number of Exif-related modules around: https://metacpan.org/search?size=20&q=exif. Perhaps somebody here has an opinion on which is best.

In reply to Re: Adding properties to a file by philipbailey
in thread Adding properties to a file by BernieC

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