IDEA初始

（1）方法分割线：Editor->General->Appearance 勾选Show method separators

（2）编辑区分屏：右击编辑器选项卡Split Vertically:水平分屏、Split Horizantally:垂直分屏

（3）取消右侧竖线：Editor->General->Appearance 取消show hard wrap and visual guides