I would like to zoom out webpage to show original layout on mobile devices

Hello Admin,
I am using Pinboard theme, but I do not know how to show the entire webpage on a mobile device without loosing the original layout.

It should for example zoom out automatically to fit on smaller screens.

For example the following site http://ladieswithanattitude.com/ shows the entire layout on a mobile device.

But my site does not : http://stylebylife.com

Thanks,
Best Regards,
Sener.