Create a new basic project with an Empty Activity
Open the res/layouts/activity_main.xml
file and go to the design tab
Click the “Hello World” TextView element
Click the wrench icon
In the popup select an element other than "None"
Go to the Attributes Panel and click on the three dots ... next to the tools text
attribute (not the regular text attribute)
"Sample data"
Click the first element after the "Sample data"
header (Usually "cities"
)
Drag a new RecyclerView item from the Palette
Click on the RecyclerView element
Click the wrench icon
Click the forward and back arrows and make sure that the template in the background changes
Set the number of elements to different values and check that it affects the preview in the background
Click the arrows again until the template says "Default"
and click outside of the popup and restore the number of elements to 10
Verify that the preview is back to the original state