iOS 11 it is far from perfect, and that means there are many bugs that many people can exploit to make various changes to the interface. In the case of other operating system bugs, there is also the possibility to modify the animations, or very simple functions, but everything depends on what can be discovered by those who dedicate their time to verifying the functionality on iPhone.
iOS 11 has presented today some tricks and bugs that we can use to fool our friends, or in certain situations, to modify the way the operating system looks and works. In iOS 11, these tricks and bugs are temporary, because most of them will be removed by Apple when the final version of the operating system is released.
iOS 11 is currently in the beta testing period, so it's normal that it's not perfect, Apple's engineers are constantly modifying its functionality. Having said that, I leave you in the company of these discoveries made for iOS 11 and if you are interested in playing with your iPhone terminals, I recommend you to try them.
