I need to ensure that certain cells in every row are filled in by the user.
How can I add code to force data input into, say, columns D, E and H when
the user navigates to the next row? Perhaps a popup box informing the user
and highlight the empty cell(s) in yellow for instance? Can the user then not
be able to continue until the empty cell(s) are filled in?

Thanks,
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Traa Dy Liooar

Jock