AC26 - Folders in Building Materials

[Nik]

EDIT - Ignore this, I've found the solution! Simply had to drag down the window divider - didn't spot it was there

In Building Materials is it possible to split the folder view so that you can see the folders at the top of the screen and the contents of the selected folder at the bottom? This is how Layers and Surfaces work, but Building Materials seems to be different. How do you move a building material from one folder to another?

Cheers, Nik