I never used exiftool before . I have created a screen shot of a map . I would like to tag the jpg file with the URL link that created it. This is quite a long URL . I first tried to include a file with the URL information in it, I don't seem to select the correct command syntax. Any calcification appreciated. Where MapLink is a file with the URl information in it . and Directions.jpg is the image file Should it be exiftool -Comment <= MapLink Directions.jpg exiftool -Comment<=MapLink Directions.jpg In general I don't seem to be able to write the UserDefinedURL field with anything . I can get the word MapLink in the comment field but not the file contents with Quotes or not. the -tagsfromfile . What should the file look like ? Should that have the tag name in it and the tag ?