In your HubSpot account, click the settings icon, in the main navigation bar.
On the left sidebar menu, navigate to Marketing> Email.
Under the subscriptions tab, you will see all types of subscription pages.
Use the dropdown menu to select the right template.
You can search for the theme name as a keyword when selecting the dropdown for easy search for the template that you want to use.
e.g. We searched the outlook keyword and the outlook subscription preferences showed up.
Reference video: https://share.vidyard.com/watch/StUYqnGRYxqaznMGijYKc9?