Canon 300 - Manual (Page 56)

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A confirmation message appears.
4. Press [New] and paste the address.
Hint
If the address book already has an address with the same name
as the pasted one, the following message appears.
• If you select [New], an address with the same name is created
in the address book.
• If you select [Overwrite], the existing address with the same
name is overwritten.