meaning? If youre css competant, you'll notice theres a signin.css in your /styles/vanilla (or whatever) folder. You can play with that to get what you want.
Do you mean editing the content? Then it is in the dictionary files.
If you could give us a little more detailed information, that would be great. It is a little hard to give you specific instructions at the moment though.
It's probably not too big a deal... but I'm pretty picky. BTW this is awesome software... as soon as I find a way to get ipb converted to vanilla, I will start converting all my forums to it.
atm I need to find a way to downgrade my forums from 2.1 to 2.0.4 then convert to phpbb which will lose user passowrds in the process... and thenconvert to vanilla... FUN!