stackBreakPosition

The strategy for whether a row of text should be broken before or after it exceeds the ideal length. If stacking is turned on, label placement can insert a line break before or after the word that overruns the maximum number of characters per row. Using the LabelStackBreakPosition.Before option means rows will generally be shorter than the LabelDefinition.stackRowLength (although will overrun for individual words larger than this count).

The default is LabelStackBreakPosition.Automatic (which will have the same effect on labels as LabelStackBreakPosition.After).

This property has no effect if LabelDefinition.stackStrategy = LabelStackStrategy.None.