alter theme setting

Hi on my site i have a banner that cuts off the theme page behind

please see wording ‘African Dream’ on below link

http://www.kruger2canyonproperties.co.za/cms/estates/raptors-view/rv-property1/?preview=true&preview_id=47&preview_nonce=269306459d

the box for the text is too long and cutting of the graphic for th emain page behind, can someone tell me how to alter this please

thanks Tim