While working, you'll want to preview your Hololink whenever you've made changes to it.

To preview, simply click the 'preview' button in the upper right-hand corner of the editor.

Now scan the QR code with your phone, enable the camera in the web browser and point your phone camera it at the anchor image to preview the experience.

The preview url that you access through the QR code is only active for 2 hours. After this, it will renew. So if you want the experience to be live on the same url for more than 2 hours, you'll need to publish your Hololink.