Robert
I examined it. It's function is very strange which I could not understand. It does not work as you said. It can Highlight the whole text but can not select them. Sometimes it selects characters of just the last page and sometimes it selects just one character.
Meanwhile after right-clicking on the characters which has been selected and select 'Update Fields' (to update Cross-references page numbers) it JUST update some of Cross-references and nothing done with other Cross-references.
Would you explain more about this function and give me your idea about selecting JUST characters to update Cross-references.
Mohsen