If you have already started building your instant site and are logging back in to make more changes, please do the following:

2
Open the Instantsite application.

3
Once you are in your Instantsite editor you can skip steps 1 (Design) and 2 (Pages) and click on Step 3 "Edit" to make changes to your website.

Please note: Your changes will only be published to your live site once you have republished your website by clicking on the Publish tab.