Visual Materials are used by objects in a Hype and determines the object's color and other visual properties.
Visual materials can be assigned to an object from the Basic Details panel.
The Visual Node has four material slots available, but not all objects will use all 4 material slots.
Visual Materials can be managed from the Visuals option found in the Hamburger menu.
Visual Materials can also be managed via the visual Node of any object. Tap a Visual Material preview to select a new Visual Material, then select the plus to add a new material or the pencil to edit existing materials. Editing existing material will change that material for anything that is using it.