The symbol on Omnipresent Man’s shirt is the place marker from Google Maps. If memory serves, Mr. Everywhere’s symbol is the place marker from MapQuest.
It was only after I’d introduced Omnipresent Man and featured him in several comics that I realized that I needed to flip the shadow on the symbol when he faced the other direction. By then I had flattened the art in a way that made it difficult to manipulate. Also, the way the shadow interacted with the thumb of his left hand gave me trouble.
You wouldn’t believe how much work I did to get out of having to actually draw my comic strip. I think one of the most important moments in my life was the day I realized that laziness actually leads to more work.