I'm working on a simple walk cycle and I want to have my character looking around the scene. I already have key frames for the x axis rotation of the head so the character's head bobs as he walks, so is there any way for me to key frame just a single axis of the rotation, so the bob could stay in the x axis and I could have his head move in the z axis without the two interfering? If not, how could I achieve this effect? Do I animate the head rotations first then add the bobbing last? Thanks!
To insert a keyframe for a single axis, change the value of your axis in the properties panel (N), hover over it, right mouse button click it and select "Insert Single Keyframe". This will allow you to change the value of a single axis while keeping the other values untouched.