Existing users, 
Experimenting I found that to set a tag you must drag the file_to_be_tagged onto Tagger. If you add two or more tags they must be separated by an underscore: tag1_tag2_tag3.
You may drag several simultaneously to set common tags to a group of file.
It would be nicer if the authors wrote an introduction on how to use it.
To soon to rate.
Tagit
Tag and rate any file on your Mac. Search for tagged files.
Version: 1.2.1
setting the tag of a file
Feedback Type: Usage Tip
Contributed by: fhirsch Monday, January 19 2009 @ 10:30 AM PST
Product Platform: MacOSX
Used Product For: Less than a month
Comments
setting the tag of a file - Tom Andersen
There is a web page about tagit on our site. The help item links to it, and it basically contains all there is to know.To add tags, just type them. You generally want short single word tags. But for a two word tag, such as 'New York' - you do need to use an underscore to create it.
Hope this helps,
--Tom
Wednesday, February 11 2009 @ 08:49 AM PST
setting the tag of a file - SJJ
"If you add two or more tags they must be separated by an underscore: tag1_tag2_tag3."You only need the _ if you want a tag with 2 strings, like "holiday photo". Just use a space to separate tags.
Reply to This
Tuesday, January 27 2009 @ 11:11 AM PST