Size and behaviour of top banner

Size and behaviour of top banner

Good day Zoho support, is there a way to reduce the vertical size of the top banner to allow more room for the page content to display? See screen shot below...site is  https://sitebuilder-678794373.zohositescontent.com



Also, is there a way to stop the banner following you as you scroll down in the page? If yes, can this be applied to a single page?

Thanks in advance