[Android Studio] Android Studio Bottom Bar option is gone, how to pull it out

Reprint: http://blog.csdn.net/hyr83960944/article/details/38067785

There is an option bar on the bottom edge of Android studio, including Run,android and many more, but if you don't know where you're coming from, the bottom option bar is missing and how to tune it out. Very simple, for example, the sidebar is missing:

At this point, just click on the box button and the bottom bar can be transferred out. In fact, this and the previous said a document about project can not find the same, but still a lot of people ask the bottom bar, so this side to explain the next

[Android Studio] Android Studio Bottom Bar option is gone, how to pull it out