In 2013, we added a third column on devices for 5-inch screen or larger devices, like the Lumia 1520, to enable more stuff to show up on the screen. People really liked this so we are enabling this on all screen sizes in Windows Phone 8.1. Pin away! We’ve also added the ability to customize your Start background with a favorite picture or one of the options we’ve provided, which will make many of the tiles on your Start screen become clear so you can see the background you selected as you scroll up and down.
