diff --git a/optuna_dashboard/ts/components/StudyDetail.tsx b/optuna_dashboard/ts/components/StudyDetail.tsx
index 0db620ac..b1d4c368 100644
--- a/optuna_dashboard/ts/components/StudyDetail.tsx
+++ b/optuna_dashboard/ts/components/StudyDetail.tsx
@@ -220,6 +220,16 @@ export const StudyDetail: FC<{
               }
               label="EDF"
             />
+            <FormControlLabel
+              control={
+                <Checkbox
+                  checked={preferences.graphContourChecked}
+                  onChange={handlePreferenceOnChange}
+                  name="graphContourChecked"
+                />
+              }
+              label="Contour"
+            />
             <FormControlLabel
               control={
                 <Checkbox