diff --git a/PixelatorControllerSettings.md b/PixelatorControllerSettings.md
index 0abdb4d..1a1c52b 100644
--- a/PixelatorControllerSettings.md
+++ b/PixelatorControllerSettings.md
@@ -191,8 +191,25 @@ Each of these settings files is described in a section below.
  [Zone Plate](Config_ZonePlate)
 
 ## Axis
-Definition of coordinate axes names to be referenced by positioners with the **axisName** setting.
+Definition of coordinate axes names to be referenced by positioners with the **axisName** setting. 
 
+ **nexus_name**::<BR>
+&emsp;String value defines the label string to be used in NeXus files, since these must conform to a specific naming scheme.
+
+Example:
+```json
+{
+   "SampleX" : {
+      "nexus_name" : "sample_x"
+   },
+   "SampleY" : {
+      "nexus_name" : "sample_y"
+   },
+   "SampleZ" : {
+      "nexus_name" : "sample_z"
+   }
+}
+```
 
 ## Epics
 This file contains global epics settings.