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diff --git a/doc/gpg.texi b/doc/gpg.texi
index d840b8573..3c505c94d 100644
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@@ -1007,6 +1007,15 @@ signing.
Make the key as small as possible. This removes all signatures from
each user ID except for the most recent self-signature.
+ @item change-usage
+ @opindex keyedit:change-usage
+ Change the usage flags (capabilities) of the primary key or of
+ subkeys. These usage flags (e.g. Certify, Sign, Authenticate,
+ Encrypt) are set during key creation. Sometimes it is useful to
+ have the opportunity to change them (for example to add
+ Authenticate) after they have been created. Please take care when
+ doing this, the possible usage flags depend on the key algorithm.
+
@item cross-certify
@opindex keyedit:cross-certify
Add cross-certification signatures to signing subkeys that may not