Sony T1 uses same IR touch technology and has pinch to zoom built into the firmware. I have used it reading pdf books and documents on T1 Kobo uses different system to zoom in on pdf. T1 also can pinch to zoom when reading ebub books which I sometimes do by accident as not any reason to do this. It is handy when using web browser. Kobo has not implemented pinch to zoom yet but they could.
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