Problem with publication of photos on Instagram

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Axel134 Posts 5 Registration date Thursday December 11, 2014 Status Member Last seen September 7, 2015 - Sep 7, 2015 at 02:02 AM
Hi,
I recently updated this application, and heard that we can post entire photos.

Normally, a little button appeared at the moment you want to post a new photo, and also proposed to post your photo in "entire", not in traditional "square". And it doesn't appear on my phone.

Can you help me? I've got an iPhone 6 IOS 8.4.1.