diff --git a/src/PlayerSettingDialog.cpp b/src/PlayerSettingDialog.cpp
index a823e85..a82efa7 100644
--- a/src/PlayerSettingDialog.cpp
+++ b/src/PlayerSettingDialog.cpp
@@ -74,7 +74,8 @@ PlayerSettingDialog::PlayerSettingDialog(QWidget *parent) :
     this->p2_rb_1->setChecked(true);
     this->btn_p1->setText("open");
     this->btn_p2->setText("open");
-    this->btn_exchange->setText("exchange");
+    this->btn_exchange->setText("exchange(Ctrl+X)");
+    this->btn_exchange->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_X));
     this->p1_hbl_1->addWidget(p1_rb_1);
     this->p1_hbl_1->addWidget(p1_rb_2);
     this->p1_hbl_2->addWidget(le_p1);
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 6bec099..cdfe531 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -61,7 +61,7 @@ MainWindow::MainWindow(QWidget *parent)
     this->pActionEnd->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_E));
     this->pActionClear->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_C));
     this->pActionTakeBack->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_T));
-    this->pActionBoardSize->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_B));
+    this->pActionBoardSize->setShortcut(QKeySequence(Qt::Key_B));
     this->pActionTimeoutMatch->setShortcut(QKeySequence(Qt::Key_M));
     this->pActionTimeoutTurn->setShortcut(QKeySequence(Qt::Key_T));
     this->pActionMaxMemory->setShortcut(QKeySequence(Qt::Key_O));