diff --git a/js/phet-io/gravity-force-lab-basics-phet-io-elements-baseline.js b/js/phet-io/gravity-force-lab-basics-phet-io-elements-baseline.js
index 40af92e..cac7010 100644
--- a/js/phet-io/gravity-force-lab-basics-phet-io-elements-baseline.js
+++ b/js/phet-io/gravity-force-lab-basics-phet-io-elements-baseline.js
@@ -343,7 +343,7 @@ window.phet.phetio.phetioElementsBaseline =
       "phetioTypeName": "ActionIO.<DOMEventIO>"
     },
     "gravityForceLabBasics.general.focusProperty": {
-      "phetioDocumentation": "",
+      "phetioDocumentation": "Stores the current focus for the simulation, null if there is not focus. This is not updated based on mouse or touch input, only keyboard and other alternative inputs.",
       "phetioEventType": "model",
       "phetioFeatured": false,
       "phetioHighFrequency": false,