1.设置自动缩进
file->setting ->Editor -> CodeStyle 中勾上 "Default Indent Option " 中的 "Use Tab Character (Smart Tabs) "
2.用滚轮放大缩小字体
file->setting->editor->general->mouse->勾选change font size with ctr+mouse wheel
3.文件重命名
文件右键->refactor-rename
