Hey folks! 
After spending a few weeks in Canary to gather user feedback, Live Preview is now generally available from Postman 7.21.0! You can download the latest version of the app here.
Live Preview brings a bunch of new features:
- All components of your requests (headers, query and form parameters) are updated as you edit your request! This means no more clicking on the “Preview” button when adding an Authorization header.
- You can now see all headers, including the auto-generated ones, before sending your request.
- Auto-generated header now display a tooltip explaining why they’re being added to the request and how you can disable or override them.
If you have any questions regarding Live Preview, the following sections of our Learning Center have been updated and should be able to help:
And if you still can’t find your answer, reply to this post and we’ll be happy to help!