I saw this short tutorial on youtube, someone made a rotation animation of two keyframes, opened the graph editor, changed the interpolation mode to linear and selected linear extrapolation. The effect was, that although he animated a limited rotation, the extrapolatiton made the rotation infinite in both directions.
I tried to make this with my Blender (version 2.69), but as I opened the Key-window inside the graph editor there was no Extrapolation mode to select, only interpolation mode.
Do I have to add this mode separetly or is there another way to create this infinite rotation ?

