1st off, we're going to need a layout. U can either make ur own, or u can grab one from the layouts section!
Now after we chose our layout (I will be using this one), we will copy the code
Now on on the buletin editor, we will click on this button:
Now click "insert link" and paste ur code in there
Now click "Confirm" and that's it!
Now ur bulletin has a layout!
Hope this helped!