Choose a specific Alexa Device in the Skill Test Simulator
There are a lot of different Alexa devices that support different interfaces. The Echo Show has a screen and supports the Display interface. The Echo Auto supports the Geolocation interface. The Alexa app on a smartphone supports the Navigation interface.
For skills that make use of interfaces like these, it would be helpful if you could select a specific Alexa device from a dropdown list in the Skill Test Simulator and get a request envelope that more closely matches what that device will actually send.