HP 5961-0509 manual Increases in proportion with the point size

zFill mode— Specifies how the printer renders filled characters according to the following parameter values.

•0— Specifies solid fill using the current pen and edging with the specified pen (or current pen if the edge pen parameter is not specified).

•1— Specifies edging with the specified pen (or current pen if the edge pen parameter is not specified). Characters are filled only if they cannot be edged (bitmap or stick characters), using the edge pen.

•2— Specifies filled characters using the current fill type (refer to the FT command in Chapter 20, The Line and Fill Characteristics Group). The currently selected pen is used. Characters are not edged. If the edge pen parameter is specified, it is ignored.

•3— Specifies filled characters using the current fill type (refer to the FT command in Chapter 20, The Line and Fill Characteristics Group). The currently selected pen is used. Characters are edged with the specified pen (or current pen if the edge pen parameter is not specified).

zEdge pen— For characters that are to be edged, this parameter indicates the pen that is used to edge the character (black or white).

z0—No edging.

z1—Black edging. The outline pen width is not selectable, but varies in thickness in proportion to the point size of the font.

Note that the Absolute Direction (DI) and Relative Direction (DR) commands do not cause rotation of fill patterns. Fill patterns remain fixed with respect to the current coordinate system. The CF command remains in effect until another CF command is executed, or the printer is initialized or set to default conditions.

Note	The edge pen width is not specifiable; its thickness automatically
	increases in proportion with the point size.

EN CF, Character Fill Mode 23-21