PenciDesign replied
Hi,
As I see you're using Customize to config the homepage, so you can use the header signup form to display the banner below the slider. Please do follow steps:
1/ Go to Appearance > Widgets > drag & drop widget "Custom HTML" or "Image" to "Header SignUp Form" sidebar and put your banner on it.
2/ If you want to display it for the homepage only, you can add more this code to Customize > Custom CSS to make it show on the Homepage only ( by default, it shows on all pages ):
.penci-header-signup-form{ display: none; }
body.home .penci-header-signup-form{ display: block; }
Best Regards,
PenciDesign