ajvTerm is pretty simple, but there's still the inevitable details.

First, the way to get into config mode is with control-Escape (that is, hold the "ctrl" key and hit "esc"). Each menu item is cycled through its legal values when you hit the corresponding function key. The menu items are:

Unlike the "factory standard" firmware, the config is not saved as it is changed. So you can try out a new config, but until you hit ENTER in config mode, the config will revert to the old one when you restart the terminal.

There doesn't seem to be any good way to do underlining, so the terminal just uses inverse character for any display enhancement.