TreeBunch view and operations

How do we draw multiple trees on one picture?

Assume, we have four trees - T1, T2, T3 and T4 (see figure 1.).

Figure 1.

We fix the order of tips to the most frequent one (1,2,3,4,5 in this case), in order to do this we have to redraw the T3 tree to T3' as shown on figure.

Then we just draw them one on another ( C1 on figure 1).

If we don't consider frequency of occurrence we get representation C2, which shows the variants and places of disagreement. If we consider frequency of particular tree we'll get representation C3, which show us the level of unsertainity around nodes 3,4 and 5 and dominating patterns of branching.