MC transport comand with ProTools

I´m working with classical music and sometimes have to make Mark in/out during playback (speed or half speed) and after that need to make fine adjust the in/out locations of the selection to get correct positions before cuting.I can fine adjust selections start point but when I go to the selections end point and try to fine adjust it and touch the wheel it moves to the start point.The command I´m searching is to Move or Trim the Selections End Point.

Mac osx 10.7.5, PT 10.3.2 , Eucontrol.app 2.7.1