How do you get the damn page-guide to work in XCode 3.1.2? I've set the text-editing preferences to use it, and to position it at column 80, however it doesn't appear in any of my files. I'm trying to keep my code-width consistent for people I'm sharing the code with (as they may be using different monitor sizes etc.) but it's a bit tricky to have to judge width by looking at the little column counter in the file-name at the top. So, is there some additional trickery I must perform, or another feature that may be preventing the page-guide from displaying? I haven't been able to find any project-specific settings that could be overriding it or anything.