To access a list of all the custom fields in your site, follow the steps mentioned below.
Step 1: Login to your MailMunch account, and click on the site you wish to see the subscribers for.
Step 2: Navigate to the left menu panel, and click on Subscribers. You should now be able to see all the subscribers recorded in your Mailmunch account.
Step 3: Click on the AUDIENCE SETTINGS present on the top right corner of your screen. You can access your Lists, Tags, and Custom Fields from here. Select the Custom Fields option from the drop-down menu.
Step 4: On this page, you will be able to see a complete list of your custom fields, as well as their slugs that you can use to personalize your emails.