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+How are slur fonts organised?
+
+xhslu20: see xslhu20
+
+xslhu20: half slurs, pointing up
+ right
+ width in steps of 12pt (12pt-96pt)
+ height in 16 steps
+ left
+ idem
+
+xslhd20: half slurs, pointing down, idem
+
+xslu20: whole slurs, ascending
+ pointing up
+ height (dy) in 8 steps
+ width in 16 steps of 4pt (8 pt - 64pt)
+ pointing down
+ height (dy) in 8 steps
+ width in steps of 4pt (8 pt - 64pt)
+
+xsld20: whole slurs, descending
+ pointing up
+ height (dy) in 8 steps
+ width in steps of 4pt (8 pt - 60pt)
+ pointing down
+ height (dy) in 8 steps
+ width in steps of 4pt (8 pt - 60pt)
+
+
+xslhz: middlepieces for half-slurs
+ pointing up
+ width in 100 steps of 4 pt (4 pt to 400pt)
+ pointing down
+ idem
+
+xslz: horizontal slurs
+ pointing up
+ width in 54 steps of 4pt
+ pointing down
+ idem
+
+xtie: same as xslhz.