[JSup tag|Tags] are marked as ''used'' the first time they are referenced from any [JSup Code|code] of your [JSup application|application].

The fact that a previously used tag becomes no more used in the [JSup application|application] is not automatically detected. 

An updated of [JSup tag|tag] usage status can be requested with menu ''Tools / Update tag usage''. The usage status is cleared and the [JSup application|application] is scanned for actual [JSup tag|tag] usages.

This update could be useful to [JSup Deleting tags|delete unused tag] or to [JSup Tag list dialog#Tag edit|edit a tag] (because some changes to [JSup tag|tag] are not allowed when it is marked as used.