public void SetLayoutFixedNumber(
	int number,
	SpacingRuleJustification just,
	double gridlinesRotation,
	double offset
)

Public Sub SetLayoutFixedNumber ( _
	number As Integer, _
	just As SpacingRuleJustification, _
	gridlinesRotation As Double, _
	offset As Double _
)

public:
void SetLayoutFixedNumber(
	int number, 
	SpacingRuleJustification just, 
	double gridlinesRotation, 
	double offset
)

When changing the Layout to FixedNumber, you must also simultaneously set the Number, Justification, GridlinesRotation, and Offset properties.