The character entered after the opening marker indicates what caller will be used in the text.
In Unformatted view, you can enter your choice of character (preceded by a space) after the initial opening marker. Two examples:
\x - \xo 1:3 \xt… or \x # \xo 1:3 \xt…
In Formatted and Standard view, the default character - is chosen when a cross reference footnote is inserted. This can be changed, one cross reference footnote at a time, by clicking the character in the Footnote pane and selecting and entering a custom caller from the Footnote Caller dialog.
In Formatted and Standard view, the Footnote pane opens automatically when you insert a cross reference footnote. To open the Footnote pane without inserting a cross reference footnote, select Show Footnotes from the View menu.
Automatically generated callers
The - character indicates that an asterisk will be used in the text. If you wish to use a different single character or sequence of characters, you can define this in the Language Settings used by your project (on the Other Characters tab) and then use the + character in your cross reference footnotes. When you view your text in Standard, Formatted or Preview view, the character(s) you define will be displayed.