How can i make my reply on forum to be accepted as a solution?

Sorry in advance for this silly and wired question.How can i add this solution Capture2button to my post or reply I do not understand how to do it?

The creator of the topic can mark your post as solution if they consider it as such
Not everyone kows it exist, so not everyone does that

If you look at my post you may see you could mark it as solution now that you have created this topic

Oh well! i undestand it now @ieahleen . Thanks for your reply. :smiley: