-Using @code{dired-undo} (usually bound to @kbd{C-_} and @kbd{C-x u})
-to reinsert or delete subdirectories, that were inserted with explicit
-switches, can bypass Dired's machinery for remembering (or forgetting)
-switches. Deleting a subdirectory using @code{dired-undo} does not
-forget its switches. When later reinserted using @kbd{i}, it will be
-reinserted using its old switches. Using @code{dired-undo} to
-reinsert a subdirectory that was deleted using the regular
-Dired commands (not @code{dired-undo}) will originally insert it with
-its old switches. However, reverting the buffer will relist it using
-the buffer's default switches. If any of this yields problems, you
-can easily correct the situation using @kbd{C-u i} or @kbd{C-u l}.
+Using @code{dired-undo}
+@iftex
+(@pxref{Marks vs Flags,,, emacs, the Emacs Manual})
+@end iftex
+@ifnottex
+(@pxref{Marks vs Flags})
+@end ifnottex
+to reinsert or delete
+subdirectories that were inserted with explicit switches can bypass
+Dired's machinery for remembering (or forgetting) switches. Deleting
+a subdirectory using @code{dired-undo} does not forget its switches.
+When later reinserted using @kbd{i}, it will be reinserted using its
+old switches. Using @code{dired-undo} to reinsert a subdirectory that
+was deleted using the regular Dired commands (not @code{dired-undo})
+will originally insert it with its old switches. Reverting the
+buffer, however, will relist it using the buffer's default switches.
+If any of this yields problems, you can easily correct the situation
+using @kbd{C-u i} or @kbd{C-u l}.