How to display Product in Bugzilla ticket list

I have several products in my Bugzilla database and when I look at my ti开发者_如何学编程cket list there is no column for product.

How do I get a sortable Product column to be displayed?

And How do I make it the site default for all users?

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Edit Bugzilla/Constants.pm and change DEFAULT_COLUMN_LIST to include product.