Developer/Custom CSS Section
You can view this section by following the simple steps below:
1. Click on the Settings > Customize Design tabs on the left of the Discounted Pricing app screen.
2. Once on the Customize Design window, Choose Advanced.
You can then see the Custom CSS section at the lower portion.
As the screenshot suggests, please only use this section if you have an understanding of HTML and/or CSS as this can cause the app to break, or create very unexpected results.