Explanation: Pushing this button switches on the playback of images, pushing a second time switches off. Tapping the shutter release button also switches off the playback.
If you have taken another photo since last playback the most recently taken image will appear otherwise the last one you have looked at.
Tips: When looking through your photos try not only the multi selector but also the front and rear command dial. You need to switch on the option „Menus and playback“ in the custom setting menu f6 Customize command dials first.