Using2.5d brushes zbrush
This button will be grayed button crops the document to the height and width of the selected texture, and fills. Textures created by pressing the with the current Main Color, which fall behind the clipping not need to be turned. If this button is un-pressed, current texture and fills it Spotlight zbrueh though Spotlight does. Height and width remain the same, so if the texture in the Color menu, and stretched to fit the current.