I came from using Nikon D7100 (and previous models), where I could assign a function button to stop flash from firing off. I find this feature very useful when it comes to event photography. When I take formal group photos, I could shoot one without flash and almost immediately shoot a subsequent one with flash. I am wondering if E-M1 comes with such a feature? The fastest method I could think of is assign a Set to a function button. However, it is still not as fast (by split seconds). After I have released shutter, I have to wait for 1 second for buffer to clear, before I can switch to MySet. This 1 second is very critical for presentation of token and handshake shots. And also, MySet consists all pre-settings (e.g. white balance), which I do not prefer.