diff --git a/umap/static/umap/js/modules/form/fields.js b/umap/static/umap/js/modules/form/fields.js
index 2223173e..d04b4196 100644
--- a/umap/static/umap/js/modules/form/fields.js
+++ b/umap/static/umap/js/modules/form/fields.js
@@ -1191,11 +1191,13 @@ Fields.TernaryChoices = class extends Fields.MultiChoice {
 
 Fields.NullableChoices = class extends Fields.TernaryChoices {
   getChoices() {
-    return [
-      [true, translate('always')],
-      [false, translate('never')],
-      ['null', translate('hidden')],
-    ]
+    return (
+      this.properties.choices || [
+        [true, translate('always')],
+        [false, translate('never')],
+        ['null', translate('hidden')],
+      ]
+    )
   }
 }
 
diff --git a/umap/static/umap/js/modules/schema.js b/umap/static/umap/js/modules/schema.js
index 99a8645a..3dacf79d 100644
--- a/umap/static/umap/js/modules/schema.js
+++ b/umap/static/umap/js/modules/schema.js
@@ -447,6 +447,11 @@ export const SCHEMA = {
     label: translate('Display label'),
     inheritable: true,
     default: false,
+    choices: [
+      [true, translate('always')],
+      [false, translate('never')],
+      ['null', translate('on hover')],
+    ],
   },
   slideshow: {
     type: Object,