While working on a responsive design in Reflow. You may find yourself styling an element while you are in one of your breakpoints. For example, you may have added a background color and image to a box while in your 350px breakpoint like this:
However, you actually want all of these styles on the default breakpoint. To push these styles to the default breakpoint, hover over the right edge of each style. You should see a button show up looking like this: . Pushing this button next to a style will push that region specific style to all breakpoints.