How do I accept an answer, and what are the rules?

To accept an answer, click the "check mark" button underneath the vote buttons:

 

Additionally:

 

• Only one answer at a time can be the "accepted" answer.
• There's a brief period (15 minutes) immediately after asking the question when you can't accept any answer.
• You may change which answer is accepted, or simply un-accept the answer, at any time.

Source How does accepting an answer work?

How do I accept an answer, and what are the rules?

To accept an answer, click the "check mark" button underneath the vote buttons:

Additionally:

• Only one answer at a time can be the "accepted" answer.
• There's a brief period (15 minutes) immediately after asking the question when you can't accept any answer.
• You may change which answer is accepted, or simply un-accept the answer, at any time.

Source How does accepting an answer work?