1. Draw a structure.
2. Select G-groups from the Draw menu to display a G-group Definitions dialog box.
3. Click New. The Define New G-group dialog box is displayed.
4. Click Atoms, Shortcuts, or Variables. An appropriate dialog box, e.g., Atom Selection is displayed. Make selections for the definition of your G-group. Click OK when you are done.
5. Click Save in the Define New G-group dialog box.
6. Select Single Use or Multiple Use in the G-group Definitions dialog box.
7. In the Structure Drawing window position the G-group at the desired location.
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