File->Project Structure->Modules->Dependencies->+
File --- Settings... --- Editor --- General --- 勾选Show quick documentation on mouse move
File --- Settings... --- Editor --- General --- Code Completion --- Match case(取消勾选)
File --- Settings... --- Editor --- File and Code Templates --- Includes --- File Header
File --- Settings... --- Editor->General->Editor Tabs->取消show tabs in one
原文:https://www.cnblogs.com/chen-ws/p/11794700.html