It's great isn't it? That's the "Material Theme UI" plugin. You have to install it through the Plugin Repository. Here's the link: plugins.jetbrains.com/plugin/8006-...
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Which theme is that in the first image?
It's great isn't it? That's the "Material Theme UI" plugin. You have to install it through the Plugin Repository. Here's the link: plugins.jetbrains.com/plugin/8006-...