Every once in a while you find code whose control structures are wrapped around a ton of working code... paging up and down to try to grok the entire structure

Every once in a while you find code whose control structures are wrapped around a ton of working code... paging up and down to try to grok the entire structure pagefaults my short term memory badly enough that having it all visible at once is the only workaround. Sometimes, if you're really lucky, the blocks of working code don't modify their own conditionals, and you can 'fold' them and just look at the if's and loops...