All green colors are changes. All blue colors are code you need to add.---------------------------------------------------------------in includes/scp/css/scp.css change this:#container { width:960; // To whatever width you want. margin auto 20px auto;}---------------------------------------------------------------in /assets/default/css/theme.css add this anywhere after a " } "table { width: 100%;}.clear { /* visibility: none; */ visibility: hidden;}#header p { text-align: right; width: 300px; margin: 0; padding: 20px 16px 0 0;}#new_ticket_wrap { width: 65%;}#check_status_wrap { width: 65%;}#ticketForm > table { table-layout: fixed; margin: 0 auto; width: 100%;}#ticketForm > table td + td { float: left; width: auto;}#reply textarea { width: 100%;}If you don't see any changes right away, clear your web browser cache.