Users can mark a reply as the Best Answer for their question
To mark a message as the Best Answer, click "Select this answer" on the reply.
If you change your mind or if another reply provides an even better answer, you can revoke the first selection and accept the second reply.
To revoke a Best Answer, click Options and then "Not the Solution".
You can choose another solution or leave the question unsolved.
For more Forum Tips & Tricks see here: X1 Forum FAQs