If the structure has been optimized using Orca
at a higher level than AM1 then Click the MWF toolbar button
The options are
1 Start MultiWFN. This will open the DOS MultiWFN interface
2 MO cube files for Chimera plots. This option will generate Chimera plot files for a series of molecular orbitals given in a comma delimited list.
3 Calculate the Electron Localization function. There is a tutorial on ELF / TOPMOD
4 LOBA calculation of Oxidation state.
5 Electrostatic Potential Surface
6 Hirshfeld Charges. This option will calculate Hirshfeld charges which can be viewed using Setup / Atom labels / Atom charge labels
7 Generate a spin density cube file if the system has unpaired electrons
8 Open the MultiWFN manual if it is called manual.pdf and is in c:\multiwfn/manual.