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+@Section
+ @Title { "@HContract" and "@VContract" }
+ @Tag { hcontract }
+@Begin
+@PP
+hcontract. @Index { @@HContract symbol }
+vcontract. @Index { @@VContract symbol }
+contraction @Index { Contraction of object }
+The @@HContract symbol reduces the size of its right parameter to a
+reasonable minimum (after paragraph breaking). For example,
+@ID @Code "5i @Wide @HContract { A |1rt B }"
+has result
+@ID { 5i @Wide @HContract { A |1rt B } }
+in which the B is much closer to the A than it would otherwise have
+been. @@VContract is similar, but in a vertical direction. See
+Section {@NumberOf size} for a more extensive discussion.
+@End @Section