In this tab, you can create polygon selections from the tree’s trunk, branch and leaves.

These can be used to assign materials to the individual parts.

Selections

You can automatically create polygon selection tags for Trunk, Branch and Leaf layers, using the appropriate check box.

In this image, a selection tag is assigned to each of the Trunk, Leaf and Branch materials, which are enabled in the Selections tab. Materials are being applied to each individual tag, with the Trunk material being shown in the Material link field.