+The default default is the first item in the empty string. The special
+default string
+.RB ` @ '
+sets the default to be the first item in the history list, if one is
+supplied.
+.TP 5
+.B \-i, \-\-invisible
+Don't echo characters to the screen when they're typed. Useful when
+requesting passwords and similar secrets.
+.TP 5
+.BI "\-l, \-\-list " file
+Reads a list of alternatives from
+.I file
+and displays them in a drop-down list box. The user can rapidly select
+an item from the drop-down list using the mouse or cursor keys. The
+file is not modified (but see the
+.B \-\-history
+option below).
+.TP 5
+.B "\-n, \-\-no-choice"
+One of the items from the selection list must be chosen; the user may
+not type an entry in directly.
+.TP 5
+.BI "\-p, \-\-prompt " prompt
+Sets the prompt string in the dialogue box to
+.IR prompt .
+If the prompt string contains an underscore character
+.RB ` _ ',
+then the following character appears underlined; pressing Alt and the
+leftmost underlined character (the `mnemonic') moves the input focus to
+the entry widget. If you want a literal underscore, type two
+consecutive underscores. The default is to have no prompt string.
+.TP 5
+.BI "\-t, \-\-title " title
+Sets the title of the dialogue box to
+.IR title .
+The default title is
+.RB ` "Input request" '.