The raster editor window uses one of the drawing tools to modify the current image. Tools like line, polygon or ellipse are using the active fill style to fill their interior. Some of the fill styles have their own configuration window and/or control handles that can be moved in the raster editor.
SOLID - shape is filled with primary, secondary or custom color.
PATTERN - shape is filled with one of the pre-configured patterns. The patterns use 2 colors, the primary and secondary one.
LINEAR - shape is filled with a linear gradient.
RADIAL - shape is filled with a radius gradient.
CONICAL - shape is filled with a angular gradient.
CLOUDS - shape is filled with generated cloud-like shapes.
WOOD - shape is filled with a generated wood-resembling pattern.Find out how Vista icons differ from XP icons.
See how RealWorld Icon Editor handles Vista icons.