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Preferences allow selection of Editor, Viewer and Default location to store temporary files.
Choose from JMol, ChemDraw, JME, Marvin, JChemPaint
Search Pane, Substructure search using SMILES strings generated by the chosen editor
Substructure and Similarity searches using the a "Fastsearch Index"
Other tools made available from OpenBabel
A selection of molecule viewers
Searching your hard drive Using ChemSpotlight