I have done similar thing, changed my account from Bombay to Bangalore. There was only a week left for it to be classified inactive.
You have to fill up the form attached
And then mail it to the branch where you have the account, the mail id will be cb<branch_code>@canarabank.com
<branch_code> is the last 4 digits of the branch IFSC code, this info you can pick up easily from Google.
There is a small fee for transfer, something like 50rs.