I have the video record button set up to magnify the image as an assist for legacy mf lenses on my om-d. When I half press the shutter, the image falls back to regular view. I was playing briefly with a friend's e-pl1 and noticed that the magnified image stayed on screen even with a half press. This is useful sometimes if you want to alternate between metering and focusing without having to press buttons. Is this a mode that can be enabled?