Sometimes the same action can be accomplished in these two different ways. If you have a complex object, you need to make the whole thing a group or symbol first.
Dotted line happens, indicating the animation has no ending point.
With last frame selected, drag the object to where you want it to stop and system creates a keyframe there. NONE for the last key frame to prevent additional keyframes from being tweening defined. Hold the shift key down and click on the first frame, selecting the entire area. Number in scale is percent of current size. Can also set rotate degrees.