Now the line is highlighted with a dotted line when hovering over it in the legend

qml/Screens/VisualizationScreen.qml

@@ -99,6 +99,15 @@ ColumnLayout {
                                     chartItem.series(modelData).opacity = 0
                                 }
                             }
+
+                            onHoveredChanged: {
+                                if (hovered) {
+                                    chartItem.series(modelData).style = Qt.DashLine
+                                } else {
+                                    chartItem.series(modelData).style = Qt.SolidLine
+                                }
+                            }
+
                             Layout.fillWidth: !horizontal
                         }