Hi there,

For desktop, select the Ideabook you want to share. In the top left corner you'll see a button that says Collaborate. Click on it and search for the user you want to add by email or username.

If you're using the app, tap on the Houzz icon and then tap on Your Houzz. Go to your Ideabooks and select the one you want to share. Tap on the icon with the two faces and add the user you want to collaborate with.

Hope this helps!

Thank you!