WoW! What a lucky find. You just happened to stumble upon one of the most important elements needed to master digital photography ---- the image information screen
I am sort of joking with you but also serious. Rocky gave you some great info on how to get back to the image display. But the information screen and learning how to read it will be the best thing that you can do to become the best photographer you can be.
Take a shot and look at the information and especially the histrogram. Does it have a well formed mid peak, or is it all bunched up on one side of the screen or the other. If so look at the image information to see what shutter speed and aperture was used. Make some changes to them and take another picture of the same image and see what difference to the exposure those changes make.