You may want to use a custom banner size if your website visitors are using device screens that are different to the standard desktop, tablet and mobile sizes. Perhaps your target audience regularly uses ultra-wide screens or you want to opitmize for large dual-screen mobile.
For this, you can build a custom banner - where you determine the banner dimensions.
To build a custom banner, head to “Manage Banners” from your dashboard and follow these simple steps:
Add a new banner - on the right side of your screen
Scroll to the bottom of the Assets selection where you will find “Add Custom Asset Size”. Hit this button.
A new “Custom” Asset box appears
Select your asset and enter in your chosen dimensions. You need to have:
A breakpoint for responsive sizing
Width and height
Hit save.