diff --git a/mainwindow.cpp b/mainwindow.cpp
index a558d89..4e8f5dc 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -109,15 +109,17 @@ void MainWindow::setupUi()
     channelLayout->setSpacing(2);
 
     for (int i = 0; i < 16; ++i) {
-        QCheckBox *check = new QCheckBox(QString("ch%1").arg(i));
-        check->setChecked(true);
+        QCheckBox *check = new QCheckBox(QString("CH%1").arg(i+1));
+        check->setChecked(false);
         check->setStyleSheet(
             "QCheckBox { color: #aaa; font-size: 11px; spacing: 4px; }"
-            "QCheckBox::indicator { width: 12px; height: 12px; }"
-            "QCheckBox::indicator:checked { background: #3498db; }"
+            "QCheckBox::indicator { width: 14px; height: 14px; }"
+            "QCheckBox::indicator:checked { background-color: #3498db; border: 1px solid #2980b9; }"
+            "QCheckBox::indicator:unchecked { background-color: #333; border: 1px solid #555; }"
         );
-        connect(check, &QCheckBox::toggled, this, [this, i](bool checked) {
-            onToggleChannel(i, checked);
+        connect(check, &QCheckBox::clicked, this, [this, i](bool checked) {
+            m_plotWidget->setChannelVisible(i, checked);
+            m_plotWidget->update();
         });
         channelLayout->addWidget(check);
         m_channelChecks.append(check);