Quote:
Originally Posted by
addabox 
OK, I misunderstood the hand position you're suggesting, but I'm still not feeling it.
When I thumb type with a phone sized device, my fingertips hold the device from behind and my thumbs are elevated-- I get a pretty good range of motion because they're sort of point down so I get 360º of joint movement (plus of course I don't have much ground to cover).
With a 10" tablet (I'm trying this with an equivalent sized notepad) having my fingers curled around the back forces my thumbs to be relatively flat-- now all I can do is sort of move them through a flat, 45º arc. Plus, my fingers on the back of the thing are now even less mobile than if I left my thumbs out of it-- I can literally do little more than draw up my finger into a claw, and then let them slide back out flat.
I dunno, maybe my hands operate differently from yours? Have you tried this with an actual object in your hands?
You wouldn't get the same range with your thumbs on a larger device (double the size = 4 * the area).
I have small hands, 9" from extended thumb tip to extended pinkie tip... and fat fingers.
When I bring my hands up as I described, there is about 1" between my cocked fingers and my cocked thumb.
I can easily insert a book 7-11" (or larger) book into my hands so that it is supported from the side by the heels of my hands and from the back by the palms bases of my 1st fingers.
My thumbs and fingers are still in their natural cocked positions.
Likely, my thumbs and fingers are lightly touching the front and back of the book (device).
Now, I can type normally by lifting, then pressing my fingers and thumbs (as opposed to pressing, then lifting on a standard kb)-- takes a little getting used to, but not much!
For multitouch, everything works the same by moving your cocked fingers, except the pinch motion-- you could use any 2 opposing fingers or finger and thumb (thumb on the display, finger on the back).
Now, you have at least 10 possible unique touch points on the device (more if the edges are sensitive to your palms/heels).
At any point in time, you could remove either hand and use the touch display as you do the iPhone mini virtual kb (moving the other hand, if desired, for additional support).
Or, you could set the device on the table or your lap and use a full-size QWERTY virtual kb on the display.
Try it!
The wrists, hands and fingers remain in a natural position-- like strummin', finger-pickin' or even a rasqueado!

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