diff --git a/src/gui/ctrl/window-locator.cpp b/src/gui/ctrl/window-locator.cpp
index c1152bd45..0338b6b1e 100644
--- a/src/gui/ctrl/window-locator.cpp
+++ b/src/gui/ctrl/window-locator.cpp
@@ -185,7 +185,19 @@ namespace ctrl {
   panel::Panel&
   PanelLocator::preliminary_impl_PanelLookup (int typeID)
   {
-    UNIMPLEMENTED ("search for existing panel in all windows, possibly create");
+    REQUIRE (not isnil(windowList_));
+    
+    for (auto window : windowList_)
+      if (window->getPanelManager().hasPanel (typeID))
+        return window->getPanelManager().showPanel (typeID);
+    
+    // no instance of the desired panel type exists yet...
+    for (auto window : windowList_)
+      if (window->is_active())
+        return window->getPanelManager().showPanel (typeID);
+    
+    // use the first window in list when none is active
+    return windowList_.front()->getPanelManager().showPanel (typeID);
   }
 
   
diff --git a/src/gui/workspace/panel-manager.cpp b/src/gui/workspace/panel-manager.cpp
index 73a2619fb..8691cac6c 100644
--- a/src/gui/workspace/panel-manager.cpp
+++ b/src/gui/workspace/panel-manager.cpp
@@ -136,6 +136,12 @@ namespace workspace {
   }
   
   
+  bool
+  PanelManager::hasPanel (const int description_index)
+  {
+    UNIMPLEMENTED ("search for a specific panel");
+  }
+
   panel::Panel&
   PanelManager::showPanel (const int description_index)
   {
diff --git a/src/gui/workspace/panel-manager.hpp b/src/gui/workspace/panel-manager.hpp
index d1ed12fce..1c136edd0 100644
--- a/src/gui/workspace/panel-manager.hpp
+++ b/src/gui/workspace/panel-manager.hpp
@@ -118,6 +118,9 @@ namespace workspace {
        */
       panel::Panel& showPanel (const int description_index);
       
+      /** was the indicated panel already allocated within this PanelManager's realm? */
+      bool hasPanel (const int description_index);
+      
       /**
        * Switches a panel from one type to another,
        * without touching the underlying GdlDockItem.
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 1153e5086..beaab6ce8 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -14539,14 +14539,14 @@
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1534515750767" ID="ID_1614049284" MODIFIED="1534520027505" TEXT="Panel-Lookup/Allocation">
 <linktarget COLOR="#aab7cb" DESTINATION="ID_1614049284" ENDARROW="Default" ENDINCLINATION="772;-6907;" ID="Arrow_ID_139428133" SOURCE="ID_1131466377" STARTARROW="None" STARTINCLINATION="676;1738;"/>
 <icon BUILTIN="flag-yellow"/>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1534520212473" ID="ID_172585735" MODIFIED="1534520248134" TEXT="durch alle WorkspaceWindows iterieren">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1534520212473" ID="ID_172585735" MODIFIED="1534526235983" TEXT="durch alle WorkspaceWindows iterieren">
+<icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1534520223304" ID="ID_605426716" MODIFIED="1534520247134" TEXT="jeden lokalen PanelManager fragen">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1534520223304" ID="ID_605426716" MODIFIED="1534526241279" TEXT="jeden lokalen PanelManager fragen">
+<icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1534520258251" ID="ID_634139165" MODIFIED="1534520270331" TEXT="wenn nicht gefunden, dann erzeugen">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1534520258251" ID="ID_634139165" MODIFIED="1534526246434" TEXT="wenn nicht gefunden, dann erzeugen">
+<icon BUILTIN="button_ok"/>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1534520271354" ID="ID_1722998809" MODIFIED="1534522392135" TEXT="PanelManager: reine Anfrage">
 <richcontent TYPE="NOTE"><html>
   <head>