Fluid Banner

[REVHEAD]

Hi guys
I am trying to create a fluid banner for my template I purchased , now all i can manage is a small banner in the center ,how can I make it fluid ,is there a code I need to insert ?

[5th-Level]

<a href="https://vborg.vbsupport.ru/showthread.php?t=137415&highlight=expandable+header" target="_blank">https://vborg.vbsupport.ru/showt...andable+header</a>