diff --git a/sc2/ChangeLog b/sc2/ChangeLog
index 127f2d83f..a7c87da56 100644
--- a/sc2/ChangeLog
+++ b/sc2/ChangeLog
@@ -1,4 +1,6 @@
 Changes towards version 0.7:
+- ShowPresentation() no longer clears the screen by force; presentations
+  now do this by request - Michael
 - Added match_matchPatternOnce() - SvdB
 - Fixed a problem with blue ships after Avatar's tractor beam,
   along with some other fill-stamp situations; bug #929 - Alex
diff --git a/sc2/content/slides/ending/ending.txt b/sc2/content/slides/ending/ending.txt
index 7c503a6bf..95c2cb06a 100644
--- a/sc2/content/slides/ending/ending.txt
+++ b/sc2/content/slides/ending/ending.txt
@@ -2,11 +2,16 @@
 
 #(**** This script is a wrapper for 3 sequences ****)
 
+#(Clear entire screen first; set size...)
+DIMS 320 240
+
+#(... and clear)
+CLS
+
 #(Set sequence dimensions; param1=width; param2=height)
 DIMS 320 200
 #(Everything is drawn within the clipping rect defined by DIMS, from 0, 0)
 
-
 #(Sequence 1 -- position the bomb)
 CALL slides/ending/victory1.txt
 
diff --git a/sc2/content/slides/intro/intro.txt b/sc2/content/slides/intro/intro.txt
index dc1a11c0b..9ced1d49f 100644
--- a/sc2/content/slides/intro/intro.txt
+++ b/sc2/content/slides/intro/intro.txt
@@ -5,6 +5,12 @@
 #( you MUST change timing of a subtitle, make sure this change is    )
 #( balanced off by another subtitle within the same slide!           )
 
+#(Clear entire screen first; set size...)
+DIMS 320 240
+
+#(... and clear)
+CLS
+
 #(Set sequence dimensions; param1=width; param2=height)
 DIMS 320 200
 #(Everything is drawn within the clipping rect defined by DIMS, from 0, 0)
diff --git a/sc2/src/sc2code/intro.c b/sc2/src/sc2code/intro.c
index 590521acb..c422965e7 100644
--- a/sc2/src/sc2code/intro.c
+++ b/sc2/src/sc2code/intro.c
@@ -730,10 +730,6 @@ ShowPresentation (STRING PresStr)
 	OldContext = SetContext (ScreenContext);
 	GetContextClipRect (&OldRect);
 	OldFont = SetContextFont (NULL);
-	/* paint black rect over screen	*/
-	SetContextBackGroundColor (
-			BUILD_COLOR (MAKE_RGB15 (0x00, 0x00, 0x00), 0x00));
-	ClearDrawable ();
 	UnlockMutex (GraphicsLock);
 
 	FlushInput ();