add tag
The interface for adding tags to questions confuses me quite a bit. One thing I stumbled upon today is how when I press the Enter key while the input field for tags is selected, my post actually gets submitted and saved as a draft. This is quite unexpected and I think you should consider it as a bug.

Enter question or answer id or url (and optionally further answer ids/urls from the same question) from

Separate each id/url with a space. No need to list your own answers; they will be imported automatically.