Adding material through the SceneComposer

So I have a 3D model of a tree, when I import this model into jMonkey the tree has its shape but its all red. I have a diffusemap associated with this tree,I can set the material through code (mat.setMaterial) but I was wondering if its possible to set the material with the scenecomposer?

Sure, make a new j3m file and set it on a selected geometry via the properties window.

thanks normen! I have been coding too much not making use of the scenecomposer.