Update ZMQ Message Reference

ZMQ-Message-Reference.md

@@ -287,6 +287,8 @@ Successful modification of the positioner definition will result in the publicat
  
 The **getSettings** message will return the contents of all .json files referenced in the settings .json file passed to PixelatorController on the command line, the contents of the referenced .json files is placed under the key **referencedJsonFiles**, example json string returned from the **getSettings** message:
 
+<details>
+<summary>Example return message</summary>
 ```
 {'Detector_Archive_Default': 'no',
  'Focus_Archive_Default': 'no',
@@ -1365,4 +1367,5 @@ The **getSettings** message will return the contents of all .json files referenc
  'topupConfigFileName': './config/topupNoHardware.json',
  'zonePlateConfigFileName': './config/zonePlate.json'}
 ```
+</details>