As an organiser you have option to select the theme for your landing page. They are mainly three landing page for your event and each landing page has a different header/ cover photo. 

For default theme, the size & dimension of the cover photo is less than 1 MB and 954px X 530px respectively. 

For Minimal theme, the size & dimension of the cover photo is less than 900 KB and 1440px X 715px respectively.

For split theme, the size & dimension of the cover photo is not exceed 900KB and size 862px X 824px respectively.

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