To create function curves in the FCurves window:
         
         
            -  Select an object, such as a model. 
- Make sure the properties you want to animate are selected. For example, you can select Translation. 
- Select the time at which you want to set a keyframe. 
- Set a keyframe. 
- Move the timeline indicator, change the selected properties, and set a second keyframe. 
               Interpolation is automatically created between the two keyframes. This interpolation is represented graphically as function
                  curves in the FCurves window. 
                
- In the FCurves window, select the properties you animated, then click in the FCurves pane and press A to center the function
               curves. 
            
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License