To adjust the content width (layout) of your campaign landing page, click the “Painter’s Palette” icon in the Design section and then click Layout.
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The options for your content width (the width of the elements on the page) are Default, Large, and Full-Width. Enabling Extend Content Background will make the content full-page without margins or any of the background showing.
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Here is a preview of a campaign with its layout set to Full-Width.
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*Note: mobile views will always have Full-Page content as seen here.
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