I've written this on Kakao forum a year ago and... I hope that PA can read this now directly. 

As you can see, Beauty Album takes 75% of space on the window (now with PA is 45% but still annoying). It's very annoying being applying a customization and having to drag the window to right/left to being able to see your character....

Adding that button on Beauty Album would make this very comfortable to people who have 2 screens or more.
Please, consider adding this, is a very very simple function