diff --git a/doc/manual.md b/doc/manual.md
index 97e9d5f2c..4c1bc12ba 100644
--- a/doc/manual.md
+++ b/doc/manual.md
@@ -459,6 +459,10 @@ one, and all tags have values except TAG1:
 
 In the journal file, a hledger tag value can contain: text, internal whitespace, or punctuation, but not: commas, newlines, or leading/trailing whitespace (putting quotes around it doesn't work, but probably should).
 
+The position of the comment containing the tag determines what is
+tagged - the whole transaction and all of its postings, or just a
+single posting (cf [transaction comment or posting comment](manual#comments)).
+
 In [tag queries](manual#queries), remember the tag name must match exactly, while the value part is the usual case-insensitive infix regular expression match.
 
 #### Directives