File | Line Separator(或状态栏，与文件编码相邻)，可以查看和更改当前文件的行尾强>.

File | Line Separator (or the same in status bar, next to file encoding) which will allow to see and change line ending for current file.

对于新建文件，请选中Settings (Preferences on Mac) | Code Style | General -> Line separator (for new files)