+The \texttt{\&} characters in the \arg{label} are special and indicate that the
+following character is a mnemonic for this control and can be used to activate
+it from the keyboard (typically by using \textit{Alt} key in combination with
+it). To insert a literal ampersand character, you need to double it, i.e. use
+\texttt{"\&\&"}.
+
+