[otrs] HOW TO DISABLE the "Resize Handle" on the Ticket Details Screen (Zoom?)

Hi there OTRS Gurus! We use OTRS 3 (OTRS 3.0.7) for our little IT Helpdesk and sometimes Tickets get quite long. So on the Ticket-Details Screen (or Zoom screen?!) there is a section where all the steps or incidents of a single ticket are listed. This Section does have some sort of "graphical handle" on its bottom where i can grab and resize the window section. but this is quite anoying since we need to do this often to keep an overview. HOW TO DISABLE this rezize thingy and make it show ALL steps at once ? kinda like "maximize" the view by default. Any solutions for that? best regards Axel Werner