[Koha] Admin Timeout

Hello, Does anyone know of a way to stop Koha from timing out? I would like to leave it on permamnently in my library!! Cheers, Catherine Fagan Librarian QMS Manager METIER3 PTY LIMITED ARCHITECTS LEVEL 3 BUILDING 5 658 CHURCH STREET RICHMOND VIC 3121 AUSTRALIA PO BOX 4667 RICHMOND VIC 3121 AUSTRALIA TELEPHONE 613 9420 4000 FACSIMILE 613 9420 4001 www.metier3.com.au NOTICE - This message contains privileged and confidential information intended only for the use of the addressee named above. If you have received this message in error, please notify Metier3 immediately.