Level two establishes the pattern of the major branches. Subsequent levels identify secondary branching and eventually the leaves themselves. In Figure 1, the major branching occurs part way up the trunk, and it's fairly evenly spaced. Angular positioning sets how often branches occur around the trunk or branch to which they're attached. Branches at the figure's third level, for example, form a fan instead of being equally distributed.
Orientation describes how the branches are tilting.
Note that lower branches droop down from the trunk, while upper branches are more skyward looking. Third-order branches tend to show a similar drooping effect in the lower branches. Sizing defines the length and taper of a particular branch. In Figure 1, the lower branches are considerably smaller than the mid-level branches. In Figure 1, needle color and shading was changed for the tree on the right to simulate a light dusting of snow.