Hover Divi Tab, then Click "Divi Theme Builder".
Click "Add New Template." Then Click 'Build New Template.'
Scroll Down & Select "Checkout" & then Click"Create Template."
Click "Add Custom Body" & then Click "Add From Library."
Click "Your Saved Layouts". From here you can select the Layouts you'd like to use. Then click 'Use This Layout.'
From here you can edit your Design.
That's It! You're Done 😎