--- a/UISpecificationTool.st	Tue Mar 31 20:26:18 1998 +0200
+++ b/UISpecificationTool.st	Wed Apr 01 11:35:57 1998 +0200
@@ -14,7 +14,8 @@
 
 
 ApplicationModel subclass:#UISpecificationTool
-	instanceVariableNames:'modifiedHolder aspects specification selection specChannel'
+	instanceVariableNames:'modifiedHolder aspects specification selection specChannel
+		scrolledView windowFrame'
 	classVariableNames:''
 	poolDictionaries:''
 	category:'Interface-UIPainter'
@@ -563,7 +564,7 @@
     ].
 
     selection notNil ifTrue:[
-        (builder componentAt:#Frame) destroySubViews.
+        self clearScrolledView.
         selection := nil.
     ].
 
@@ -629,14 +630,13 @@
 releaseResources
     "release resources
     "
-    |frame appl|
+    |frame appl view vscroller|
 
-    frame := builder componentAt:#Frame.
+    frame := self windowFrame.
     appl  := builder application.
     builder := UIBuilder new.
     builder application:appl.
     builder componentAt:#Frame put:frame.
-
 !
 
 specificationFor:aKey
@@ -685,7 +685,7 @@
 selection:something
     "selection changed
     "
-    |slices idx spec frame|
+    |slices idx spec frame y window|
 
     specification notNil ifTrue:[
         slices := specification class slices.
@@ -697,21 +697,57 @@
     ].
 
     spec ~= selection ifTrue:[
+        self releaseResources.
+        self clearScrolledView.
 
-        self releaseResources.
-        frame := builder componentAt:#Frame.
-        frame destroySubViews.
+        window  := self scrolledView scrolledView.
 
         spec notNil ifTrue:[
-            builder buildFromSpec:spec in:frame.
-            frame allViewBackground:(frame viewBackground).
+            builder buildFromSpec:spec in:window.
+
+            window allViewBackground:(self windowFrame viewBackground).
+            window extent:1.0@(window preferredExtent y).
             masterApplication updateFonts.
-            frame realizeAllSubViews. 
+            window realizeAllSubViews.
+            self scrolledView sizeChanged:nil.
         ]
     ].
     selection := spec.
 ! !
 
+!UISpecificationTool methodsFor:'spec. window'!
+
+clearScrolledView
+
+    scrolledView isNil ifFalse:[
+        scrolledView scrolledView destroySubViews.
+    ]
+!
+
+scrolledView
+    |frame vscroller|
+
+    scrolledView isNil ifTrue:[
+        frame     := self windowFrame.
+        vscroller := ScrollableView for:ViewScroller origin:0.0 @ 0.0 corner:1.0 @ 1.0 in:frame.
+        vscroller verticalScrollable:true.
+        vscroller verticalMini:true.
+        vscroller autoHideScrollBars:true.
+        scrolledView := vscroller scrolledView.
+        scrolledView scrolledView:View new.
+        frame realizeAllSubViews.
+        frame sizeChanged:nil.
+    ].
+    ^ scrolledView
+!
+
+windowFrame
+    windowFrame isNil ifTrue:[
+        windowFrame := builder componentAt:#Frame
+    ].
+    ^ windowFrame.
+! !
+
 !UISpecificationTool class methodsFor:'documentation'!
 
 version