Go to View - Sync Cursor to host timeline. It may only work one way (i.e. clicking on the Vegas timeline will sync in Titler Pro but clicking in Titler Pro will not sync in Vegas.
Ahhh...thanks, I get it now. Thought I'd give V11 and NBT another try. So far both V11 and NBT are a bit flaky. But not as bad as when I originally trialled them. If I open NBT in a project I've been working on, V11 crashes straight away. If I close/open a new version of V11, open same project, then open NBT, all seems OK.