I’ve often wanted to have lines for ‘rule of thirds’ in the Blender Camera as a composition aid – I’ve got countless blend files with little no-face meshes parented to cameras (that have to be moved or scaled whenever I change the camera view angle). Granted this problem could be solved with a driver (That might not update – driving on camera angle is not dependable yet), but I got tired of ad-hoc solutions.
I don’t use the Title safe option that much or at all, so with the help of a trusty text editor (gedit in my case) I hacked a couple of files and now I have ‘Thirds’ instead of title safe for the camera. The internal property is still the same, it just displays differently, so no messing with RNA happened.
If you want the same functionality and are comfortable building blender/applying patches, you can get it here . Usual disclaimers about baby eating and such apply.
Free/Open Source software is nice, isn’t it?