A tree structure is entered as a labelled bracketing of the form [Parent[Child1[leaf1]][Child2[Child2_1[leaf2]][Child2_2[leaf3]]]]
The branches can be drawn as curves, diagonal lines, or horizontal and vertical lines. The diagrams can be laid out as pure dendrograms, pure trees, or a hybrid of the two. Clicking on a node will toggle whether its descendants are displayed or collapsed.