Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum please send a message via our contact form. › Forums › OpenLB › General Topics › Defining Material Numbers › Reply To: Defining Material Numbers June 17, 2020 at 9:17 pm #5033 michael.gianfeliceParticipant Hello Mathias, Thank you for your quick reply! Where can I access the Doxygen Documentation?