If you want to populate a scene immediately, the Creation Tool is your best starting point. This Editor Utility Widget completely automates the process of spawning and configuring Forest Tools actors.
How to use the Creation Tool:
Open the Creation Tool utility menu.
Add your meshes: Populate the array with the static meshes (trees, rocks, grass) from your content browser you want to scatter.
Select a Preset: Select a pre-configured scattering behavior that matches your needs.
Select a Target: Click on the surface in your viewport (such as a Landscape or a large mesh) where you want the objects to appear.
Click Create: The tool will automatically spawn a ForestTools object, apply your meshes, and scatter them across the target surface instantly.