--- a/bash/doc/bash.1
+++ b/bash/doc/bash.1
@@ -3452,6 +3452,10 @@
 Redirections using file descriptors greater than 9 should be used with
 care, as they may conflict with file descriptors the shell uses
 internally.
+.PP
+Note that the
+.B exec
+builtin command can make redirections take effect in the current shell.
 .SS Redirecting Input
 .PP
 Redirection of input causes the file whose name results from