I meant something else.
I know in the Forum Display, you can sort by header.
What I meant is inside a thread, I'd like to sort to show the newest post first.
Here is what VB help page says about Thread Display Options Can I change the order of posts? You have a choice over how you view threads. When you're in a thread, look at the top bar. On the right hand side you'll see 'Display Mode'. Click on this and it lets you change how posts are ordered. You have three choices: Linear Mode - posts are displayed chronologically, usually from oldest to newest. Posts are shown in a flat mode so that many posts can be viewed simultaneously. It is possible to change the ordering by changing your preferences in the UserCP