Hello.. I was helping my buddy set up his new macbook tonight. I'm a relatively new 'full time' user myself -- so forgive me if this is an obvious question. Google didn't yield any results. As I was showing him around, I noticed he had some options for arranging files that I did not. Namely, 'keep arranged by'. Also 'snap to grid' and other options I've seen on some of the threads that came up in search results. I've linked a screenshot. How do I enable this contextual menu option? thanks!