diff --git a/apps/api/documents/api.js b/apps/api/documents/api.js
index 42014a68ae..2db589f2db 100644
--- a/apps/api/documents/api.js
+++ b/apps/api/documents/api.js
@@ -163,6 +163,7 @@
                     trackChanges: undefined // true/false - open editor with track changes mode on/off,
                     hideRulers: false // hide or show rulers on first loading (presentation or document editor)
                     hideNotes: false // hide or show notes panel on first loading (presentation editor)
+                    uiTheme: 'theme-dark' // set interface theme: id or default-dark/default-light
                 },
                  coEditing: {
                      mode: 'fast', // <coauthoring mode>, 'fast' or 'strict'. if 'fast' and 'customization.autosave'=false -> set 'customization.autosave'=true