Create the components to form the copolymer.
Click the S-group tool on the toolbar then select the components to be included. It is also possible to select the components with any of the selection tools and then click the S-group tool.
In the S-group Dialog select the repetition pattern and type co in the label field.
Create a Copolymer
Deleting a Copolymer
Right-click on the structure within the brackets, then select Ungroup from the menu.
When you modify the atoms or bonds in the group, it will automatically ungroup.