Hey all,
Having pieced together infos from this forum and elsewhere, I found how to create a custom 3-pane layout (gist.github.com/1320281).
The thing is, I’m not sure where I should be keeping this layout. It appears that layouts are defined twice — once in Packages/Default/Main.sublime-menu and again in Packages/Default/Default (PLATFORM).sublime-keymap.
Both of the above referenced files get blown away upon update. Where should I be putting my custom layout that I can assign a keymap to it and not lose it upon upgrade?