To draw stereocenters, follow the steps below.
Draw a chiral molecule.
Select the asymmetric carbon atom that you want to configure as S or R.
Right-click the carbon atom.
Navigate to Stereo > R/S and select the appropriate configuration.
The relevant bonds are changed automatically according to the proper R or S configuration.
You can alternate between label displays on the asymmetric carbon atom by navigating to View Menu > Stereo > R/S Labels.
To delete stereo representation, right-click on the asymmetric carbon atom and choose Atom menu > Stereo > R/S > Off.