A curriculum tree can be a simple list of activities, or it can be a multi-level collection of branches.
The top branch, or root branch, is always an Each Of branch. You cannot delete this branch. You can add activities and activity groups directly beneath the root branch, or you can add Each Of or Either Or branches.
Each branch on the tree can contain activities or additional branches "nested" below it. To add a nested branch, click the branch that it should be under. Then click Add Either or Add Each of to add the nested branch.
If a tree is long, you may want to hide portions of it so it is easier to work with. To hide (collapse) the activities under a branch, click the triangle icon next to the branch name. To display (expand) activities under a hidden branch, click the triangle icon.