List all the edges you can think of - not necessarily textile edges but they do matter. Maybe you are standing on the edge of the cliff hoping not to fall, or wondering what is over the edge. So over the edge is as important as off the edge.
When things are off the edge, are they still connected or are they free standing? Interesting one.
How can you attach things to the edge.
Sometimes things are partially suspended off the edge.
Would you consider a tail an edge?
What could be along an edge?