https://docs.unity3d.com/Packages/com.unity.device-simulator@3.0/manual/index.html

The Device Simulator is a Unity Editor feature that simulates how certain aspects of your application will appear and behave on a mobile device.

The Device Simulator consists of:

• The Device Simulator view, which lets you view your application on a simulated mobile device
• Simulated classes, which let you test code that responds to device-specific behaviors
• Device definitions, which describe the device to simulate
• Device Simulator plugins, which configure the UI of the Device Simulator view

用来做适配多分辨率/多设备适配.

打开方式为 Window / Generate / Device Simulator