Menu Position MENU --> 2 --> Display Quality
What it Does Changes the resolution of the EVF image when composing images (at the expense of considerable battery power)
Recommended Setting Standard
It took me a long time to figure out what this feature did, since I was looking for either an increased refresh rate or a higher resolution – and I was looking on the camera’s rear LCD screen to evaluate it, and I couldn’t detect any difference at all.
Then I looked through the EVF and I discovered that you really could see a quality difference when set to High. (Maybe the camera sends the same data to both screens but only the EVF is capable of showing you the difference.) Regretfully I can’t shoot the EVF screen and show you some pixel-peeping differences. But they are there if you look very carefully at highly-detailed subjects. This setting only affects Live View – playing back the image through the EVF will always be at highest quality setting.
Sony’s manual says that setting this to High increases the power consumption, so of course I wanted to find out by how much. So I measured it: the “High” setting consumes about 20% more juice. That’s a lot of power for not much more image quality.
So my advice: Set it to Standard to get the most out of your undersized battery.