I want to draw an unrooted tree for a publication, and be able to drag the nodes around. There's lots of software that will do that. But I also want to collapse subtrees down into a triangle shape, and have the lengths of sides of the triangle correspond to the shortest and longest branches in the subtree (like this). iTOL won't do this for unrooted trees (although it works for standard phylograms). Is there any software I can us to do this, other than ARB, which I'm having problems installing on my OS X 10.9 laptop? I've had a good look around but can't find any. Thanks
FigTree can collapse clades: http://tree.bio.ed.ac.uk/software/figtree/
Thanks. But as far as I can tell it doesn't work on unrooted tree displays, unfortunately. And even on rooted ones, the collapsed triangles are isometric.
Maybe GraPhlAn does what you want?
Thanks. Will check it out (also my misposted answer below)