Items of the main menubar

Set default values for background color, atoms, bonds, text boxes and drawings

Save and open Files

Undo/Redo, Copy/Paste

Decide, if all carbon atom labels should be shown

Decide, if hydrogen atoms should be added where possible

Enable or dissable the placement of non bonding electron pairs on heteroatoms.

Switch back to the original attributes for atoms and bonds.

When drawings bonds the position of the bond is locked on some positions

Show or hide a warning if an atom has to many bonds.

Calculate formula

Calculate average mass

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