Beside commenting and voting are there some other means to signal an answer as definitive when the author did not mark it so?

There are some older questions like [this][1] that are useful and actual, and which have a perfect answer that is not set as definitive.  It clearly deserves to be marked as such. Is there a level of reputation that allows that?


  [1]: https://askubuntu.com/q/67432/47206