Thanks for your question and also thanks for using our theme SuperMag. The above mentioned feature is not available on theme and you have to write custom CSS for it. If you change the default section of theme, you have to check about the responsiveness of the theme too. So, it takes lots of time to make it. So, we recommend you to hire a customizer for it. http://www.acmethemes.com/customization-request/
If you need any help regarding theme operation, please feel free to ask.