diff --git a/applets/taskmanager/package/contents/ui/ToolTipInstance.qml b/applets/taskmanager/package/contents/ui/ToolTipInstance.qml
--- a/applets/taskmanager/package/contents/ui/ToolTipInstance.qml
+++ b/applets/taskmanager/package/contents/ui/ToolTipInstance.qml
@@ -89,12 +89,11 @@
         }
         // all textlabels
         Column {
-            spacing: 0.75 * units.smallSpacing
-            PlasmaComponents.Label {
+            spacing: units.smallSpacing
+            PlasmaExtras.Heading {
+                level: 3
                 width: isWin ? textWidth : undefined
-                height: theme.mSize(theme.defaultFont).height
-                font.pointSize: -1
-                font.pixelSize: height
+                height: 1.1 * theme.mSize(theme.defaultFont).height
                 elide: Text.ElideRight
                 text: appName
                 opacity: flatIndex == 0
@@ -103,9 +102,7 @@
             // window title
             PlasmaComponents.Label {
                 width: isWin ? textWidth : undefined
-                height: 0.75 * theme.mSize(theme.defaultFont).height
-                font.pointSize: -1
-                font.pixelSize: height
+                height: theme.mSize(theme.defaultFont).height
                 elide: Text.ElideRight
                 text: generateTitle()
                 textFormat: Text.PlainText
@@ -114,9 +111,7 @@
             // subtext
             PlasmaComponents.Label {
                 width: isWin ? textWidth : undefined
-                height: 0.6 * theme.mSize(theme.defaultFont).height
-                font.pointSize: -1
-                font.pixelSize: height
+                height: 0.9 * theme.mSize(theme.defaultFont).height
                 elide: Text.ElideRight
                 text: isWin ? generateSubText() : ""
                 textFormat: Text.PlainText