Is there a more detailed explanation for what the DKIM txt record should look like ?

Is there a more detailed explanation for what the DKIM txt record should look like ?

The Help info for setting up a DKIM is pretty sparse.  (attached below.)   Could someone provide, or point me to, a simple but specific example of what my TXT record should look like / how I generate a public key.      Here is what the HELP info has.   Thank you.   

Add the domain key to your domain's DNS records:

1. Login to your DNS manager page. 
2. Goto the page from which you can update the DNS records.
3. Create a TXT record with the name as selector's name and value as TXT record value.

For example:
TXT record name : zkykler._domainkey.example.com
TXT record value : <Generated public key>

4. After creating a TXT record click on the verify button.