Latest version of Adobe Flash Player does not display iTOL trees for unknown reason. As a temporary workaround, you can downgrade your Flash player to (Win/OSX), or (Linux). A complete rewrite of iTOL is underway, which will not use Flash anymore.

Save current tree view

Tree:path2modelsViews:current | saved

Basic controls
Mode: Circular ° rotation ° arc Inverted
Ignore branch lengths Align leaf labels
Advanced controls
Display controls