The Plant Layers tab, with a hierarchy of layers building the plant.
Clicking on the drop-down arrow to the right side of the Add Part menu box allows you to add the following objects **(layers): Growth Point, Trunk, Branch, Leaf and Custom Object.
Each one of these comes with its own range of attribute settings, which are explored in the pages below.
Any layer that you add from the Add Part menu will automatically be added to the Objects list.
Layers are then enabled, by default, but can be disabled by clicking the green check mark, turning it into a red cross.
Next to this is a white circle, which, when clicked, becomes a green circle, containing a letter ‘S’.
This option will ‘solo’ that particular layer, removing all other layers from the viewport.
Finally, there is a triangle, which generates per-layer selection tags.