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How can I alphabetize my address book

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I have 3 different address books that filter in to 1 address book. I would like to combine all addresses in to one large address book, and have the addresses alphabetized

I have 3 different address books that filter in to 1 address book. I would like to combine all addresses in to one large address book, and have the addresses alphabetized

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The first part of your question makes no sense. How many address books do you have? What does filter into other address books mean?

To sort any page in Thunderbird you click the column header. You click the same header a second time to reverse the sort. You want to sort an address book by name, click the header labeled Name.