office button|excel options
It's a checkbox in the top section of the Popular category.

Ayo wrote:

I have excel 2007 but the menu above the Ribbon is missing "Developer." I
have Home, Insert, Page Layout, Formulas, Data, Review, View and Add-Ins. How
do I get the developer to show up. Or how do I enable macro if the security
alert doesn't show up when I open the file?

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Dave Peterson