Cannot print line width less than one point due to constraint.

Cause:


The narrowest line style available in PowerPoint is one point (1/72 inch). PowerPoint prints line widths less than one point only if contained within OLE objects or pasted from applications supporting narrower widths.

Solution:


Insert a Microsoft Word object as a line into the PowerPoint presentation.
NOTE: Word supports line widths as narrow as 0.25 point.