CuraEngine - Wipe and Prime Tower location

I have a issue printing larger objects with two colors (dual extruder).
The Wipe and Prime Tower is placed by the slicer so far out on the left of the build platform that extruder One tower is reduced in size. This leads to a overfilled tower for extruder one, the other extruder seams to fit right.
I have increased the size on the tower to get the flow right, so i can reduce it, but then at a risk to crash the print with to little flow.
Is it possible to move the location of the Prime tower?? There is plenty of room on different places, but the slicer always places the tower in one of the corners of the print.