From 7b322c8bb886dbd5f6ee852ce077fca484018fed Mon Sep 17 00:00:00 2001
From: keisuke-umezawa <keisuke.umezawa@gmail.com>
Date: Sat, 19 Aug 2023 16:06:20 +0900
Subject: [PATCH] Only show legend with multiple studies in history plot

---
 optuna_dashboard/ts/components/GraphHistory.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/optuna_dashboard/ts/components/GraphHistory.tsx b/optuna_dashboard/ts/components/GraphHistory.tsx
index 0b77e563..280c02fc 100644
--- a/optuna_dashboard/ts/components/GraphHistory.tsx
+++ b/optuna_dashboard/ts/components/GraphHistory.tsx
@@ -206,7 +206,7 @@ const plotHistory = (
       title: xAxis === "number" ? "Trial" : "Time",
       type: xAxis === "number" ? "linear" : "date",
     },
-    showlegend: true,
+    showlegend: historyPlotInfos.length === 1 ? false : true,
     template: mode === "dark" ? plotlyDarkTemplate : {},
   }