Change an attribute (by typing, of course).
Then click on the
REDRAW button.
You can also:
Click on the tree trunk, the general or the treetop button to restore defaults.
TREE TRUNK
Size: 0.1 ? 4.0
GENERAL
Start with angle: -180 ? 180
Maximum angle: 0 ? 360
Detail: 1 ? 8
Size: 1 ? 20
Branch with angle1: 1 ? 60
Branch with angle2: -180 ? 180
Branch with angle3: -180 ? 180
Branch with angle4: -180 ? 180
Branch with angle5: -180 ? 180
Rarefaction: 1 ? 4
TREETOP
Size: 0.1 ? 4.0