I'm not sure what your question is. User Titles get set up in Admincp > User Titles
thank you Mrs. Lynne, but i want to different things. for example, i posted to forumid xx, if i post there, my user title will change automatic as Coder, or Designer etc.
And everyone would have the same user title in forum xx? If so, I guess you can just write a condition in the postbit (or postbit_legacy) template like
<vb:if condition="$post[forumid] == xx">Coder<vb:else />Designer</vb:if>
no, you did not understand exactly. example when i post to forumid x, then it will update database user>usertitle as coder. if i post forumid y, it will update again database user>usertitle as Designer. Also user has Coder title, then it will add Coder/Desginer in postbit or postbit_legacy