About one improvement

Hi
Firstly，the app is my favorite subway info app！Thanks！
But I have a suggestion that when I tap the “search”button, then I want to return the map’s interface, I have to move the finger to the “cancel” button.It’s very inconvenient.
So, I think if we can tap the center of the screen to return the main interface or map’s interface.
My email:jiangizhang@gmail.com
Thanks,
Shawn