diff --git a/src/qml/presenter/MainWindow.qml b/src/qml/presenter/MainWindow.qml
index 349e761..f72ceb2 100644
--- a/src/qml/presenter/MainWindow.qml
+++ b/src/qml/presenter/MainWindow.qml
@@ -138,6 +138,8 @@ Controls.Page {
         presentation.itemType = item.type;
         print("Time to start changing");
 
+        // This determines if pdf and gives slide the right
+        // page count to use.
         if (item.type == "pres")
             SlideObject.changeSlide(item);
         else