The Load Material button replaces the selected material with a saved one.
The Save Material button saves the selected material to a disk file.
The Lightbox>Materials button will launch Lightbox with the Materials tab showing, so you can select a material from disk. To show in Lightbox, materials should be saved to the ZBrushCore/ZMaterials folder.
Material selection slider
Use the Material Item Info slider to select any material in this palette by number.
R – reset
Press the R (Restore Configuration) button when a large number of selected items cause this palette to grow too large. All but a few items will be hidden; they can be retrieved by pressing the large thumbnail and selecting them from the popup palette.
Current Material thumbnail
The large Material thumbnail displays the current selection. Click the thumbnail to choose from a popup menu of available Materials. In addition, this thumbnail serves as a picker. Click inside this thumbnail and drag to the canvas to pick the material at that point.
Small Material thumbnails
Click a small Material thumbnail to select that material. Recently used material will be displayed here.