diff --git a/src/reader.rs b/src/reader.rs
index 3f2a5b4..8ea9501 100644
--- a/src/reader.rs
+++ b/src/reader.rs
@@ -324,6 +324,9 @@ pub fn reading_view(
                 if ui.button("← 返回").on_hover_text("返回书架").clicked() {
                     action.go_back = true;
                 }
+                if ui.button("☰").on_hover_text("打开/关闭目录").clicked() {
+                    *sidebar_open = !*sidebar_open;
+                }
                 ui.separator();
                 ui.label(format!("《{}》", &book.title));
                 ui.label(format!("[{}]", book.layout.label()));
@@ -390,9 +393,6 @@ pub fn reading_view(
                                 }
                             });
                     }
-                    if ui.button("☰").on_hover_text("打开/关闭目录").clicked() {
-                        *sidebar_open = !*sidebar_open;
-                    }
                 });
             });
         });