+
+CSS Classes used with <kbd> are:
+.modN
+.mouse: mouse buttons
+.cmd: a command line
+.lin, .win, .mac: add nice prompts to that command line
+.input: inline text to be entered by the user
+.menu: path to an Ardour menu or other GUI item
+.option: path to an option, with (X) at the end.
+.optoff: path to an option, with ( ) at the end.
+.button, .fader, .knob: external controllers (OSC or MIDI).
+