There was an interesting question on the Quark Forum: http://forums.quark.com/t/27985.aspx
Bottom line, what resolution is ideal for the iPad and what to do now for the NEW iPad (with Retina display)? And I am sure, like the original poster, most of us heard the rule to use “72 dpi” (which should be ppi of course) when designing for screen. The 72 dpi you hear a lot results from 1) the misunderstanding about dpi and ppi (dots and pixels) and 2) monitors historically having a resolution of 72 ppi. By the way, modern monitors have much more — the Retina display of the new iPad uses 264 ppi.
So what’s the best resolution for designing for tablets?
If you just want to hear the bottom line, my advice is:
Forget resolution. Use pixels.
That means if you want to use a picture fullscreen on the iPad 2, make sure it has 1024 x 768 pixels. For the new iPad? Twice as many pixels in both directions (2048 x 1536 pixels). Resolution? It doesn’t matter: use any. (For Print of course that’s a completely different story.)
Have a look at the following example, where I used the same photo just using a different resolution each time — the last one even having only 1 ppi (yes, ONE ppi, no typo). Do you see a difference?
Screenshot from an iPad 2 showing the same photo using different resolutions but always the same pixel count (click to see full image)
Feel free to download the issue (.zave) to see for yourself on an iPad using the Quark Issue Previewer:
If you want to have the original QuarkXPress document, please send me an email.
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