In the top bar of the Editor you will find the following buttons:
Preview - test your AR scene without running it on a mobile device.
Save - save the changes you've made to your AR scene without making them public
Project Settings - manage your project's name, URL, QR code appearance, customize the loader image, add a logo to the AR camera, upload an HDRI, change image target and more
Publish - make the changes you've made public and available to all users
Get QR Code - generate and download the QR code users can scan to access your webAR experience