Editing motion path in earlier versions of PowerPoint can be tedious at times. Reason being, your end path is mostly a wild guess as you are only provided the end arrow which does not exactly show the exact position of where the object will end at. With mutliple complex paths involved, this might become frustrating to play around with. Fortunately, there are add-ins available that help to resolve this issue.
In PowerPoint 2013, Microsoft introduces a translucent image which acts as a projection on where your object will start and stop at. The projections will also appear only when you are editing this particular motion path, thus allowing them to be hidden when you are not editing the motion path. You will also be able to see more clearly where you want your object to start or end when modifying the motion path.