create new tag while editing an article

I did not find the way to create a new tag from within the editing page for an article in Joomla 2.5. Till now I have to go to the Custom Properties dashboard and add the new tag first. Is there a way to do that from inside the JCE editing form ?
thanks

New tags can only be created from the backend, in all versions of Custom Properties.

Backend is ok for me. Don't need to create from front end. But I wish to create new tag (not just choosing from existing tags) at the same time as I publish a new article. Impossible ??

Tags can only be created and managed from the Manage Custom Properties page.