diff --git a//home/me/qetgit/sources/diagram.cpp b//home/me/me/QET/qet/sources/diagram.cpp
index .. 100644
--- a//home/me/qetgit/sources/diagram.cpp
+++ b//home/me/me/QET/qet/sources/diagram.cpp
@@ -227,7 +227,9 @@
 				points << QPoint(gx, gy);
 			}
 		}
-		p -> drawPoints(points);
+		QPen point(Qt::black, 1);
+		p -> setPen(point);
+		p -> drawPoints(points);
 	}
 
 	if (use_border_) border_and_titleblock.draw(p);