[kira]

Hi hissatsu! You do need the prefix hack installed in order to use the version specifically for thread prefixes. See the intro here:

Important: There are two different versions of the instructions: one for a default setup, and one for people using the excellent Thread Prefixes mod by Mystics. Please make sure you choose the correct version for your setup!

If you don't use the Thread Prefix mod, you should use the file called displayoptions to top.txt . If you do have the Thread Prefix mod, use the file called displayoptions to top_prefix.txt.

The version without the prefix mod looks pretty much the same, it just won't have the prefix dropdown.

Does this make sense? Hope it helps!