The useUI switch exists in leo/plugins/qt_frame.py. At one time, it may have been possible to specify the contents of Leo's window with Qt Designer <http://doc.qt.io/qt-4.8/designer-manual.html> files when this switch is True.
At present, however, when useUI is True, Leo fails at startup with an ImportError: no module named Qsci (Scintilla) when using the Anaconda 2 or 3 distros. I don't see any reason to retain this ancient code. Does anyone use it? Edward -- You received this message because you are subscribed to the Google Groups "leo-editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/leo-editor. For more options, visit https://groups.google.com/d/optout.
