I'm trying to accomplish what the image of the two ponds shows as "inset" shading. They called this Bevel effect, which I think was down in Adobe Illustrator. I'm using ArcMap 10.3 without 3D Analyst.
I want to shade a river polygon so it ultimately appears as if it's at a lower elevation then the ground. The closest I've come to that is creating a buffer around it using the Buffer wizard (see image with shaded rivers).
I've also used the move tool through the Layer Properties menu --> Representations. However, this only makes the polygon appear to pop up.