This article will help show you how to add custom CSS and JS to a Justuno promotion
Step 1: Head to your promotions and under actions hit edit design
Option 1: You can also head to the custom section at the top right hand corner of the design canvas that separates the tab and overlay code for you. Make sure you hit "override" switch to make sure this code is pushed!
Option 2: Highlight the area you'd like to edit and hit the 'Source' button. Once clicked the selected area will display the code for that section:
Friendly Note: We keep Justuno an open platform for those users who are technically savvy enough to implement the changes they want, we do not offer custom coding for clients.