How to use floating windows function in Redmi 1S?

Puzzled about the floating windows function in Redmi 1S and unable to use it properly? Get a better understanding of how the floating windows function works on Redmi 1S.

I bought Redmi 1S a month ago. While exploring its features I found floating windows option to individual application under settings. I enabled the function but how does it work? I tried by opening the app and minimizing it to background process but nothing happened. Please explain what the feature is for?