There should be gravity and more options. Try restarting the SOLIDWORKS or your system and check.
....From tutorials, ....
What tutorials? You didn't include url reference.
Is the tutorial you are using for reference demonstrating Simulation Express, or is demonstrating SolidWorks Simulation?
Are you a student? What version of SolidWorks are you running?
Check your Add-ins - you should have the full version of SolidWorks Simulation.
If you are using Simulation Xpress (which you are, it's written in the upper right corner on your screenshot) you don't have that feature.