My understanding in preferences is that it allows me to set the graphic elements that I would like by default to be included.
To that end I have made selections including Jitter on and turned others off such grand mean line.
When I do a oneway analysis the points are jittered as requested, but the means diamonds are INCLUDED. I then have to turn them off every time by going to the red triangle and going to display options and deselecting means diamonds.
Maybe I am confused about the meaning of preferences and I assumed that this would control the default display when using that platform.