To set an index keyword to jump to another keyword
Open an index (.hhk) file, click the keyword you want to jump to another index keyword, and then click Edit Selection.
Edits the associated name, file, URL, keyword or style information for the selection.
Click the Advanced tab, and then select the Target is another keyword check box.
Click the General tab, and then click Edit.
In the File or URL box, type the keyword you want to jump to, and then click OK.
This is useful for creating cross-references, such as See Also index entries.