File–>Setting–>Appearance & Behavior–>File Colors,点+号进行设置
效果图:
在编辑器处按快捷键:ctrl+shift+a,
搜索set background image
或
在File–>Setting–>Appearance & Behavior–>Appearance–>Background Image
设置背景图片
ps:自己未找到更换主题为windows选项,未成功
https://jingyan.baidu.com/article/e2284b2b973d21e2e6118daa.html
https://blog.csdn.net/guo13313/article/details/80001017
http://www.jetbrains.org/intellij/sdk/docs/reference_guide/ui_themes/themes_intro.html