I really like the desktop-tablet-mobile options in GB, especially the ability to use the grid and change column sizes. My current practice is to make my tweaks for the different screen sizes in GB, and to view those tweaks in another tab in Chrome using the device toolbar. While I like my work flow I’m wondering if there is an easier way. Do you have any suggestions for viewing the changes on different screen sizes? Also, is this the kind of thing GB might build in in the future, a native way to view the three screen sizes?