It would be good, if it was possible to edit items in the list boxes directly, line inline renaming. This came up in a discussion with Kundal, who is working on a new, revised version of the Tagger script. Currently, a click on existing keywords in the list would add those to the edit field at the bottom, if the intention is to collect keywords to apply them to some other image.
In case there is a misspelled keyword, it has to be substracted first, using the "-" method, the added again (like in "+apple;-appoe"). The same applies to cases, where some entry should be removed from the list ("-apple;"). The idea is, to be able to remove the item from the list directly, & also, to edit typos directly in the list.