[Anthony Giorgianni]

Thanks Tony.

I found the problem. On my old laptop, I must have assigned F5 to turn on
hgihlighting. So when I transferred the macro to my new laptop with
"Sendkey" F5, it didn't trigger the highlighter but instead ran Find and
replace, the assignment for f5 on that machine :O)

Now it works fine with:

Sub HighLight_Red()
Selection.Range.HighlightColorIndex = wdRed
SendKeys "(F10)"

With F10 now assigned to turn on highlighting.

End Sub

Thanks again to you and Lene.

Regards,
Anthony Giorgianni

For everyone's benefit, please reply to the group.