I think this is what your asking for...Not sure if it has any ill affects anywhere else but it shouldn't. The conditional in there is to keep it from sending the tag twice when viewing discussion lists.
I am seeking different format for different sections of the forum. The code appears to be aimed at all the pages of the forum right? Let's see if I can make it work for myself. Thanks.
PS: Would these changes disappear on XenForo updates?
Does not seem to work for me. Thread title tag is still not showing category/forum name just the board name. Has something changed in the last 2 years? I am pretty sure I have edited the right template and cleared the cache! Is there any documentation of the tags being used here?