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-rw-r--r--doc/user/str_marg16
1 files changed, 9 insertions, 7 deletions
diff --git a/doc/user/str_marg b/doc/user/str_marg
index fdb58f4..f7057c0 100644
--- a/doc/user/str_marg
+++ b/doc/user/str_marg
@@ -147,12 +147,14 @@ may be used inside the @Code "x" and @Code "y" options:
A { "ymark" }
B { The row mark of the object being placed (for expert users) }
}
-The usual precedences and associativities apply to the mathematical
-operators; braces (not parentheses) may be used for grouping. It is
-best to give values to @Code "x" and @Code y that do not depend on
-any assumptions about where the coordinate system's origin is; this
-is true of the examples above. At the point where @Code "@Place" occurs,
-the result is an empty object. As with margin notes, Lout does not know
-what is happening and will not lay out the rest of the page around the
+Negative numbers have to be enclosed in double quotes to avoid the
+initial @Code "-" being mistaken for subtraction. The usual precedences
+and associativities apply to the mathematical operators; braces (not
+parentheses) may be used for grouping. It is best to give values to
+@Code "x" and @Code y that do not depend on any assumptions about
+where the coordinate system's origin is; this is true of the examples
+above. At the point where @Code "@Place" occurs, the result is an
+empty object. As with margin notes, Lout does not know what is
+happening and will not lay out the rest of the page around the
placed object.
@End @Section