The Generic material settings are organized in Basic and Advanced modes. You can switch the mode from the toggle button under the Preview Swatch.
An Add Layer button is provided for some V-Ray materials, including Generic. You can select an additional layer that can add up to the appearance of the material. For more information, see the How to Work with Materialspage.
From the Add Attribute button,you can select additional attributes that can add up to the appearance of the material. For more information, see the Attributes section.
UI Text Box
type
tip
Holding down Ctrl while having the Add Attribute or Add Layer menu open, allows selecting multiple entries without closing the dropdown.
The context menu of the Color slot provides options to Copy and Paste, as well as to Reset the color.
A Reset option is provided in the context menu of each Number Slider. You can reset the slider value to the default one.