Zenity Access Keys

The [Gnome Help zenity manual](https://help.gnome.org/users/zenity/stable/usage.html.en) explains: >An access key is a key that enables you to perform an action from the keyboard rather than use the mouse to choose a command from a menu or dialog. Each access key is identified by an underlined letter on a menu or dialog option. Some Zenity dialogs support the use of access keys. I tried to use this feature with several Zenity dialogues but I had no success. A MWE:

--list  --column "Item"  "Apples"\  "Oranges"\  "Pears"

Adding an underscore (e.g. "_Apples") as explained by the Help page the Access Key does not seem to work. Question: the manual says that "some Zenity dialogs" support this feature. Which dialogues? I tried several dialogues but I failed. Thanks a lot.