diff --git a/book/source/04-certificates.md b/book/source/04-certificates.md
index b99fe94..bdce127 100644
--- a/book/source/04-certificates.md
+++ b/book/source/04-certificates.md
@@ -146,9 +146,9 @@ For example, some third party may be sure about the email identity of a contact,
 
 Within a certificate, a specific User ID is designated as the [Primary User ID](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#name-primary-user-id).
 
-Each User ID carries associated preference settings, such as preferred encryption algorithms, which is detailed in {numref}`zooming_in_user_id`). The preferences associated with the Primary User ID take precedence by default.
+Each User ID carries associated preference settings, such as preferred encryption algorithms, which is detailed in {numref}`zooming_in_user_id`). When a certificate is used in the context of a specific identity, then the preferences associated with that identity component are used. When a certificate is used without reference to a specific identity, the preferences associated with the direct key signature, or the primary User ID take precedence by default.
 
-The primary User ID was historically sometimes used to store preferences that apply to the certificate as a whole. For more details on this, see {ref}`dks-puid`.
+The primary User ID was historically the main store for preferences that apply to the certificate as a whole. For more on this, see {ref}`primary-metadata`.
 
 ### User attributes in OpenPGP
 While