Changing default textures in Doom Builder 2

I remember in the old Doom Builder, there was a way to change the default floor, ceiling, and wall textures used when you create a sector; how do you change it in version 2? It would really help instead of having to keep changing stuff.

Also, does anyone know of a guide/manual for this version, or if one is in development? I have the version 1 guide, and it helps for alot of stuff but not everything is the same.

You can't.

Sorry.

At least it doesn't makr them BIGDOOR1 like in Builder 1.

And it bases the next lot of textures and flats on what you've got there at the moment, which is pretty cool.

Ask for it as a feature request. It's pretty simple at the moment. I'm sure it will get better.