There have been a few times this has been mentioned on Twitter in the past few months but recently we have seen more. Facebook notifies this feature with a dynamic effect. Although this feature is not available on iOS devices, but has seen on many Android phones, so it is probably being released widely.
Zoom in with two fingers without leaving the News Feed
Previously users could touch to zoom in, but the new feature will be faster and allow zooming in without leaving the News Feed. Pinch-to-zoom on News Feed also helps to expand images more than when touching photos like before. Especially, this feature only works with private photos, not with albums.
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