Originally Posted by theducks
Can you do a (optional) sub-menu
EPUB <submenu> Label : Program call ... <endsub-menu>
"Edit" : "Sigil.exe ";
"Validate" : "Flightcrew.exe ";
"Alt-View" : "Firefox.exe " /* uses EPUBReader */
The version I have pushed does not build it as a sub-menu. It is just a second level menu so you could have for instance:
"EPUB Edit in Sigil"
"EPUB Validate in FlightCrew"
"EPUB View in Firefox"
The text is configurable. I would guess for most people they aren't going to bother configuring much other than EPUB so not having to go one further level down in the menu with the mouse is an advantage.