+ * the warning about the negative slur/tie length appears twice
+ which is irritating.
+
+ * The `3' in the meter key is a one or two pixels too thin (at 600dpi)
+ in the middle:
+
+ * better hshift (dots, distance, head dependent)
+
+ * tie/slur dir & curvature
+
+ * stem len adjustable
+
+ * mindist for spanners
+
+
+