You click on "start a bounty" on an eligible question. From the bounty FAQ on MSO: "A bounty can be started on a question two days after the question was asked."
As of this posting, your only unanswered question is 1 day old, and not eligible yet.
6 of 7
replaced http://meta.stackexchange.com/ with https://meta.stackexchange.com/
jscott
- 24.9k
- 19
- 14