[
{ type: install
  message: <<EOM
You can install  and use different backend for the visualisation:

- "tk"      x11-toolkits/py-tkinter
- "pyqt5"   devel/py-qt5-pyqt
- "pyqt6"   devel/py-qt6-pyqt
- "pyside6" devel/pyside6
- "wx":     x11-toolkits/py-wxpython
EOM
}
]
