How do you give away a brainliest

For me it just pops up after someone gives you the answer

If two person had given your answer then there is a option of mark as brainliest. Click there in the option of mark as brainliest in which you like the answer most. If any one person has given answer then after some days you will a notification to mark his/her answer as brainliest. By this you can mark an answer as brainliest.

Id click on the little pic on the camera with the dude running