diff --git a/NOTES b/NOTES
index c70da25..b9c8b44 100644
--- a/NOTES
+++ b/NOTES
@@ -488,3 +488,8 @@ U+2590 RIGHT HALF BLOCK
 
 ITU-T Recommendation T.100 is another standard that encodes 6-cell
 mosaic graphics.
+
+FontForge's "Expand stroke" may be useful for converting single-line
+font into something useful.  A 50-unit circular pen generates Bedstead
+Plotter.  A 100×50-unit, 20° rectangular pen generates a surprisingly
+good Bedstead Calligraphic.