Why won't my screen change to landscape when phone is rotated?

[iMore Question]

Videos not text screen stays on vertical position rather than horizontal when phone is rotated.

 

[H3aTeRzz]

Hi

Slide your finger on the screen from bottom up, to open the toggles window. You should then see an icon with a small lock, and circular arrow around the lock....make sure that's selected. That is your screen orientation toggle.

 

[Larry Cook1]

You will find the icon at the top right on your control center.