[otrs] How to set responsible for e-mail ticket

Hello, I have a question, is there a possibility to manually set the responsible of a e-mail ticket in otrs 2.4.4? Our user helpdesk is advised to set the responsible technican as a ticket is statet in our ticket system, but this feature is missing. I don´t know how to enable a drop down menu or something to enable this feature. Can someone help me out ;) Mit freundlichen Grüßen / Kind regards Markus Moj IT Infrastructure & Services TimoCom Soft- und Hardware GmbH In der Steele 2 D-40599 Düsseldorf Tel: +49 211 88 26 80 14 Fax: +49 211 88 26 70 14 eMail: MMoj@TimoCom.com www.TimoCom.com Geschäftsführer: Jens Thiermann, Gunther Matzaitis Amtsgericht Düsseldorf, HRB 34489