RehabMan
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- May 2, 2012
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1366x768
What you're doing then doesn't make any sense.
You can only add HiDPI resolutions for resolutions less than 1366x768.
For example, if you wanted 1280x720, you would add 1280x720 and the double 2560x1440, which would enable 1280x720 HiDPI. It may not look great, but might look better than 1280x720 non-HiDPI.
You cannot create HiDPI resolutions larger than your native resolution. That is... 1600x900 is not possible. Your display is not capable, so it doesn't make any sense. The result would be loss of information and poor quality.