You can create a Popup form and link it with a menu button on your Shopify store. Follow the easy steps mentioned below.
Step 1: Open your MailMunch Shopify app.
Step 2: Navigate to your Mailmunch menu bar items on the homepage and select Campaigns. Click on the Create New Campaign button present in the top right corner of your screen.
Step 3: Click on Signup Forms from the different campaign types displayed, and then select Popover from the different form types displayed.
Step 4: Select an attractive template. Design and customize your campaign to your liking. In the Publish step, copy the Trigger on Click code.
Step 5: Open the admin panel of your Shopify store, click on the Online Store -> Navigation. Click on the Main Menu or the Footer Menu.
Step 6: Add menu item, enter the menu name and paste the code you copied earlier in the Link tab. Click on the Add button to apply changes.
Step 7: Click on the Save menu button.