Hi!

When you go to edit your email in the campaign, you’ll see a “Preview” icon on the left.  Click that and then you’ll see an option to send a test email to an address of your choosing:

Hello @Sales@AHB,

In addition to the option highlighted by @Mailbox Manny, you can also create a list, add your own email to the list, and use this list as your recipient group for your campaign send. This would allow you to send the email as a Live version to your inbox. After sending, you can then clone this campaign and make any edits and adjustments you need before sending it out to your desired recipients. 

Both the option highlighted by Manny and myself can be found in the How to Preview and Send Test Emails in Klaviyo Help Center Article. 

I hope this helps!

David