this is expected behaviour - you can't access it because you're in "media mode". in image mode, you can adjust the settings of each individual shot, but not the settings for your 'drafting' scene. the changes you make while you're in the image mode will be saved individually for each image. if you want to adjust the settings for your general scene, you can do so by clicking on the 'quit media mode' on the right side. adjusting the settings here won't affect the settings of your saved shots.