diff --git a/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassLoaderView.kt b/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassLoaderView.kt
index 27c02bad..def0e69c 100644
--- a/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassLoaderView.kt
+++ b/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassLoaderView.kt
@@ -297,6 +297,7 @@ class NumassLoaderView : View() {
                 datum;
             }
         } ui {
+            //TODO do smart update here
             detectorPlotFrame.setAll(it)
         }