This question already has an answer here:
It would be useful to be able to have comments on a bounty once it has started so that:
- The bounty poster can add updates if they want to clarify what they are looking for. (This would be less needed if it was possible to edit the bounty message)
- People can ask the bounty poster to clarify what they are looking for.
I've just posted a bounty and I'd like to add something to the message. The only option at the moment is to add comments to the question which I'm reluctant to do as the will not be relevant to the question once the bounty has been awarded.