Data Type: double
Default Value: tsWordDefMinSpaceWidth= 0.09, tsWordDefMaxSpaceWidth= 1.5
Description: Default min and max inter-word spacing (when the average character width is unknown – if there isn't a font definition for the font).
These are the default spacing to use if NO EMBEDDED FONT exists in the PDF file. Normally this is not used (most PDF files have embedded font details).