No problem. On the order page product designer, if you choose a jersey that allows for the reversed side to print, the reverse icon 
 will appear. Clicking on this icon will show you the reversed side, but you will also have to select the checkbox on the graphics or names and numbers tab that states “images / numbers on reverse side?” to allow for printing on the reverse side. After you have selected this box, you may add features to either side and have different colors for the normal side and the reversed side. The designer will tell you which side you are looking at — front and back for the normal side, reverse front and reverse back for the reverse side. Again, toggle between front and back and normal and reverse sides with the flip icon 
 for front and back and the reverse icon  for the reverse and normal side. After you make all of your changes, what you see on the designer is what you get for that side shown. You will have a final chance to approve your selection on the confirmation page that will show you all four sides at one glance and the options you chose for each.