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I know this question has been asked before, but most questions with answers seem outdated (like this one) and I was wondering if anything has changed.

In Ubuntu 16.04 (Unity), is it possible to have pinch-to-zoom gestures on a touchpad, provided that the hardware allows it? I have a Dell XPS 13 (which shipped with 14.04, but I upgraded it) and the touchpad allows two-finger scrolling just fine, but I do miss the more fancy multi-touch functionalities. This post explains how to check the number of fingers the touchpad supports using the geis-tools package; I found my laptop actually detects five, so it should be possible in principle. Off-topic: Who even uses five-finger gestures?

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Bib-lost
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Holding down CTRL while pinching or zooming will allow you to perform the gesture.

From this post

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saeed hardan
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    Thanks! I had eventually figured this out myself too. It works fine, although unfortunately having to use the CTRL key makes it slightly less intuitive and well-designed than the functionality in Windows or iOS. – Bib-lost Mar 13 '17 at 17:28