Comment explanatory parts

diff -ur a/src/branding/default/show.qml b/src/branding/default/show.qml
--- a/src/branding/default/show.qml
+++ b/src/branding/default/show.qml
@@ -19,7 +19,7 @@ Presentation
         console.log("QML Component (default slideshow) Next slide");
         presentation.goToNextSlide();
     }
-
+/* Uncomment to enable multiple slides
     Timer {
         id: advanceTimer
         interval: 1000
@@ -27,7 +27,7 @@ Presentation
         repeat: true
         onTriggered: nextSlide()
     }
-
+*/
     Slide {
 
         Image {
@@ -37,6 +37,7 @@ Presentation
             fillMode: Image.PreserveAspectFit
             anchors.centerIn: parent
         }
+/* Uncomment to show some text
         Text {
             anchors.horizontalCenter: background.horizontalCenter
             anchors.top: background.bottom
@@ -49,8 +50,9 @@ Presentation
             width: presentation.width
             horizontalAlignment: Text.Center
         }
+*/
     }
-
+/* Uncomment to enable multiple slides
     Slide {
         centeredText: qsTr("This is a second Slide element.")
     }
@@ -58,7 +60,7 @@ Presentation
     Slide {
         centeredText: qsTr("This is a third Slide element.")
     }
-
+*/
     // When this slideshow is loaded as a V1 slideshow, only
     // activatedInCalamares is set, which starts the timer (see above).
     //