diff --git a/mkdocs.yml b/mkdocs.yml
index 091f847cd6bea4c6b873c6b3f513bac5409150ed..04a0e0028a7ffbca74a215d4d28bdea7d5be3760 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -251,6 +251,11 @@ nav:                                      # Customizes the main navigation struc
             - Getting Started: documentation/sizing/create_mission_xml/getting_started.md
             - Mission Steps: documentation/sizing/create_mission_xml/mission_steps.md
             - Airports: documentation/sizing/create_mission_xml/airports.md
+            - API Reference:
+              - create_mission_xml/classes.md
+              - create_mission_xml/namespaces.md
+              - create_mission_xml/files.md
+              - create_mission_xml/functions.md 
           - Fuselage Design:
             - Introduction: documentation/sizing/fuselage_design/index.md
             - Getting Started: documentation/sizing/fuselage_design/getting_started.md