What it does: After your home page is loaded, this code will rearrange your panels into a single column format. It does this by removing the "rightColumn" and placing it underneath the "leftColumn", then resizing the columns for a better fit.
You can move your panels around within this single column (actually stacked column) layout. When you move a panel, it will snap back to its original size while you're moving it. The next time the page loads, the panels will be the right width. You'll probably have to rearrange your stickers after this.
You can place this code in any Custom HTML/CSS editor and it will work. You can change the value of newWidth from 900 to whatever you like, but 900 pixels is the size of the original 2-column format.
You can check out my page for an idea of what this looks like.