Draw an Atom
Change an Atom Type
Select the atom/atoms you would like to change with the Select tool, and then type the chemical symbol on your keyboard, or use the buttons on the Atoms toolbar.
Right-click the atom and change the atom type in the Atom Properties dialog window.
Draw a Bond
To create a bond between two atoms, select the appropriate bond type from the Bonds combo box on the Tools toolbar and click one of the two atoms then drag the bond to the other atom or an empty place.
Change a Bond Type
Select another bond type from the Bonds combo box and click the bond to be changed.
Right-click the bond and choose another bond type in the Bond Properties dialog window.
Move the mouse over the bond and hit the appropriate keyboard shortcut.
Place a template on the canvas by selecting a template from the Template Toolbar and click on the canvas. Predefined abbreviated groups can be also useful to create complex molecular structures.