Cannot Set Material to Metaballs I'm still fairly new to Blender and I have a question I cant seem to find the answer to. I'm trying to make this low-poly bonsai tree by creating leaves with Metaballs but I can't seem to set the material for the Metalball groups. 

As you can see, the material field is blank. I don't know if I'm doing something wrong, or I haven't turned on the proper settings. Please help! Thanks :)
scroll up on the properties window (see that bar on the far right?