Usually because of the gatcha ads on top 
the preview screen on the tp shop is small making your character preview smaller 
making it hard for you to see certain details on the costume/cosmetics (hair/contact lenses) you would like to purchase.
What if there is a button that would hide the ads on top and enlarge you character so you can see all the sweet details of your costume and cosmetics? 
Extra points if you can put some simple gesture button that would make the previewed character RUN JUMP ATTACK and STATIONARY.