Structure Tab

Name	Description
MarvinSketch
Highlight Valence Errors	Highlights atoms having wrong valences with a red underline when it is checked.
Automatic Lone Pair Calculation	Calculates lone pairs automatically. Make sure View > Misc > Lone Pairs is checked to see the result.
Automatic Plus Signs in Single Step Reactions	Enables automatic reaction recognition.For more information, see Creating Reactions.
Validate S-groups At Creation	Disables the S-group types in the drop-down list which would not yield a chemically correct structure.For more information, see Substructure Groups in MarvinSketch.
MarvinView
Highlight Valence Errors	Highlights atoms having wrong valences with a red underline in MarvinView.
General Settings
Show Lone Pair as Line	When checked, lone pairs on the canvas are shown as lines.
Show Charge in Circle	When checked, a circle is displayed around the charge.
Carbon Labels
Always
Never
At straight angles and implicit H atoms
Ligand Orders
Always	Always display the ligand order information for an R-group.
Never	Never display the ligand order information for an R-group.
On R-groups with definitions	Only display the ligand order information on R-groups with definitions.