If you want to test devices other than the default ones, you can create your own, custom devices.
First, open the Device Drawer by clicking the 📱Smartphone icon in the app toolbar.
This will open the list of available devices. To add a new one, click on the ➕ Plus icon above the device list.
In this window, you can edit the parameters of your custom device, such as user agent, input type (touch or mouse), OS, screen resolution, etc.
As an example, here's how to simulate a Windows PC with an ancient CRT monitor running Chrome.
After saving the custom device, it will appear on the bottom of the device drawer.
Drag and drop the custom device to add it to the main workspace.