Test Studio introduces the in-product guides for some areas in the project window. The icon to look for is a rocket to speed you up in getting familiar with Test Studio.
The Rocket icon can be found in the Element ribbon, which is active, when modifying an element's find expression or image.
Starting any of the guides will gray out the selected area in Test Studio window and will go through all available buttons providing additional information for its purpose.
You can navigate forwards and backwards through the buttons in the popup message, or stop the help guide at any time.