1. Draw a chiral molecule.

   
   howto_stereo01.png

2. Click on (select) the asymmetric carbon atom that you want to configure as S or R.

3. Right-click onto the carbon atom pops up the Atom Menu.

4. Choose Stereo > R/S and the appropriate configuration.

   
   howto_stereo02.png

5. The relevant bonds will change automatically according to the proper R or S configuration.

   
   howto_stereo03.png

6. To display the stereo label on the asymmetric carbon atom, select View Menu > Stereo > R/S Labels > All.

   
   howto_stereo04.png
   The configuration of the asymmetric carbon atom is displayed in parentheses:

   
   howto_stereo05.png

To remove the stereo label from the the asymmetric carbon atom, choose View Menu > Stereo > R/S Labels > None.

To delete stereo representation, right-click on the asymmetric carbon atom and choose Atom menu > Stereo > R/S > Off.