I don't think it's off topic :) This is a really useful and I suspect under-rated feature. There was a similar feature in an older version of the Livescribe dig

I don't think it's off topic :) This is a really useful and I suspect under-rated feature. There was a similar feature in an older version of the Livescribe digital pen software. You could search for any text string, without having run the handwriting to text function. This was incredibly useful as you could search for terms not in the dictionary (so for example in my lab book I could search for gene names that handwriting to text would routinely scramble). Sadly they removed it, and I've never seen anything similar again (with the exception of the DTP-RP1 example you mention).