Autodesk AUTOCAD 2006, Command Reference Manual, Page: 825 / 1490

Default Plot Style for Objects
Sets the default plot style that is assigned when you create new objects. The
list displays BYLAYER, BYBLOCK, and Normal styles, and any plot styles
defined in the currently loaded plot style table. (DEFPLSTYLE system
variable)
Default Plot Style Table
Specifies the default plot style table to attach to new drawings. A plot style
table is a file with a .ctb or an .stb extension that includes and defines plot
styles. If you are using color-dependent plot styles, this option lists all color
dependent plot style tables found in the search path as well as the value of
None. If you are using named plot styles, this option lists all named plot
styles tables.
Use Color Dependent Plot Styles
Uses color-dependent plot styles in both new drawings and drawings created
in AutoCAD Release 14 or earlier. Color-dependent plot styles use the
numbers from the AutoCAD Color Index to create a plot style table with a
.ctb file extension. Each color is defined by a name or number ranging from
1 to 255. You can assign each color number to a different pen on a pen
plotter to achieve different property settings in the plotted drawing. If this
option is selected, a plot style is created for each color setting. You can also
select this option by setting the PSTYLEPOLICY system variable to 1.
This setting is saved with the drawing. Once a drawing is saved with Use
Color Dependent Plot Styles as the default, you can convert it to Use Named
Plot Styles using the CONVERTCTB and CONVERTPSTYLES commands.
Use Named Plot Styles
Uses named plot styles in both new drawings and drawings created in earlier
versions of AutoCAD. The drawing is plotted according to the property
settings that you specify in the plot style definition. The plot style is defined
in the plot style table attached to the layout. Named plot style tables are
files with the file extension .stb. You can also select this option by setting
the PSTYLEPOLICY system variable to 0.
This setting is saved with the drawing. Once a drawing is saved with Use
Named Plot Styles as the default, you can convert it to Use Color Dependent
Plot Styles using the CONVERTCTB and CONVERTPSTYLES commands.
However, once you use CONVERTPSTYLES to convert a drawing from using
a named plot style table to a color plot style table, you cannot use
CONVERTPSTYLES to convert it back to using a named plot style table.
Plot Style Table Settings Dialog Box | 801