How to change weapon element on +35 weapon?

I just built a weapon that I enhanced to level 35 but I would like to change it's element from light to ice. When I go to enhance the weapon it tells me that I can change the element but it doesn't tell me how. So how exactly would I go about doing that?

You can still enhance when a weapon is +35. It'll give a dialogue box that states that you can still change its element and augments.

There's a drop down at the bottom of the weapon enhancement window after that dialogue box. When you normally go to add your fodder. Which is where you choose an element switch item. (It's also where you would choose the great enhancement aid item too.)

Well when I do it, it won't show any dialogue box like that. Or at least I can't find it. Do I have to try to enhance it again even though it's at level 35?

I figured it out. Thanks.