include some initial push 2 "screenshots"

_manual/22_using-control-surfaces/06_Abelton_Push2.html

@@ -93,7 +93,7 @@ menu_title: Ableton Push 2
   them, the video display and the 8 buttons below that are combined to
   provide a global view of the session mix.
 
-  <!-- SCREENSHOT HERE -->
+  <img alt="global mix mode on Push2 screen" src="/images/push2-globalmix.png">
 
 </p>
 <p>
@@ -187,6 +187,8 @@ menu_title: Ableton Push 2
   mode, press the "Mix" button.
 </p>
 
+  <img alt="global mix mode on Push2 screen" src="/images/push2-trackmix.png">
+
 <p>
   In Track Mix mode, various aspects of the state of the first
   selected track/bus will be displayed on the Push 2. Above the