It could be useful in determining if one's digitizer is
defective if you added an option to display the
coordinate of each trial tap (in addition to displaying the
text.
By reorganizing the screen slightly, you could add a
checkbos for showing coordinates. I would show two
sets: current and the one before, perhaps like this:
[x] Show coordinates
X Y
Previous 12345678 7654321
Current 12345679 7654321
(hope the forum keeps that in the tabular format I wrote
it...)
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it didnt' keep the tabular format... the X and Y are supposed
to be labeling the two columns. Also I used arbitrary numbers
of arbitrary length for the illustration (obviously).