alacarte man page
alacarte — Edit freedesktop.org menus
alacarte is a graphical editor for the freedesktop.org menus that are used by many desktop environments. It can also edit and create application desktop files.
alacarte does not accept any commandline options.
alacarte looks in the menus subdirectory of these directories for menu files. The default location for menu files is /etc/xdg/menus.
alacarte looks in the applications subdirectory of these directories for desktop files. The default location for desktop files is /usr/share/applications.
The menus subdirectory of this directory is where alacarte stores modified menu files. The default location for modified menu files is $HOME/.config/menus.
The applications subdirectory of this directory is where alacarte stores modified and newly created desktop files. The default location for these is $HOME/.local/share/applications.
alacarte is editing the menus defined by the file $XDG_MENU_PREFIXapplications.menu. GNOME uses the menu file gnome-applications.menu.