No menu button on Meizu pro 5

On the Meizu pro 5, the menu button is not shown and there is no possibility to access the menu items.
For a screen shot, see:
https://drive.google.com/file/d/0B4TSwc ... cslist_api
For a screen shot, see:
https://drive.google.com/file/d/0B4TSwc ... cslist_api