1 files changed, 13 insertions, 2 deletions
diff --git a/doc/mod/notification-matrix.md b/doc/mod/notification-matrix.md
index 18b6607..da6d6de 100644
--- a/doc/mod/notification-matrix.md
+++ b/doc/mod/notification-matrix.md
@@ -4,7 +4,7 @@ Send notifications via Matrix
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@@ -17,7 +17,7 @@ Description
 -----------
 
 This module adds support for sending notifications via
-[Matrix](https://matrix.org/) via client server api. A queue is used to
+[Matrix ↗️](https://matrix.org/) via client server api. A queue is used to
 make sure notifications are not lost on failure but sent later.
 
 Requirements and installation
@@ -46,6 +46,15 @@ The Matrix server is connected via encrypted https, and certificate
 verification is applied. So make sure you have the certificate chain for
 your server in device's certificate store.
 
+The example below is for `matrix.org`, which uses a trust chain from *Google
+Trust Services*. Run this to import the required certificate:
+
+    $CertificateAvailable "GTS Root R4";
+
+Replace the CA certificate name with what ever is needed for your server.
+You may want to find the
+[certificate name from browser](../../CERTIFICATES.md).
+
 ### From other device
 
 If you have setup your Matrix *notification account* before just reuse that.
@@ -120,7 +129,9 @@ function available:
 See also
 --------
 
+* [Certificate name from browser](../../CERTIFICATES.md)
 * [Send notifications via e-mail](notification-email.md)
+* [Send notifications via Gotify](notification-gotify.md)
 * [Send notifications via Ntfy](notification-ntfy.md)
 * [Send notifications via Telegram](notification-telegram.md)