diff --git a/jdaviz/components/viewer_data_select.vue b/jdaviz/components/viewer_data_select.vue
index 161923b305..f6057a1f4f 100644
--- a/jdaviz/components/viewer_data_select.vue
+++ b/jdaviz/components/viewer_data_select.vue
@@ -115,7 +115,7 @@ module.exports = {
       // default to passed values, whenever value or uncertainty are changed
       // updateTruncatedValues will overwrite the displayed values
       multi_select: multi_select,
-      showExtraItems: false,
+      showExtraItems: Object.keys(this.$props.viewer.selected_data_items).length == 0,
       valueTrunc: this.value,
       uncertTrunc: this.uncertainty
     }