If >10 authors, want to show first 6 followed by an ellipse, then the last author

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Hi,

In a bibliography for references with >10 authors, I would like to show the first 6 authors, followed by an ellipse, then the final author. There is a setting in output styles to edit “Author Lists” under Bibliography for “If 8 or more authors, list the first 6 authors, insert the ellipse and add the last author’s name.” I would like to do this for >10 authors, not >8 authors. Is it possible to change this? Any ideas on a workaround?

(I am using Endnote X9.)

Thanks in advance for any help on my vexing problem!