thanks for the responses.
i understand. however i wanted to know something regarding the curve tangents.
i mean to i assumed changing the tangent in the time line only would change the in-between keyframes' spacing. however when i manipulate them in the timeline the object trajectory changes rather than in-between keyframe spacing.
this does not happen until i select the key-frames in the timeline and make them "zero angle/length"
it would be ideal if i could manipulate the trajectory (in the editor view) and the animation speed (in the timeline view) independently and interactively.
does it mean if i change the keyframes to "zero angle/length" i loose the option of manipulating the animation speed altogether. and i have to resort to the time curve?
hope i was able to explain my problem.
MG