To create an editable motion trail
Click Create Motion Trail once you have the options you want.
Depending on the display options you have set, the motion trail displays alongside your animated object. By default, the motion trail displays white markers to represent keys along a red motion trail.
To delete a motion trail
Select the motion trail in the Outliner (it will be named something like motionTrail1Handle) and press Delete.
To hide a motion trail
Select the motion trail in the Outliner (it will be named something like motionTrail1Handle) and press Ctrl + H. To show it again, select it in the Outliner and press Shift + H.