diff --git a/MUNGA_L4/L4MFDVIEW.h b/MUNGA_L4/L4MFDVIEW.h
index d85fd1f..cfd2f75 100644
--- a/MUNGA_L4/L4MFDVIEW.h
+++ b/MUNGA_L4/L4MFDVIEW.h
@@ -194,7 +194,8 @@ protected:
 //
 //   display panes  position only. A pane's size follows its content and
 //                  its button banks, so an old size from a different
-//                  build must not distort it.
+//                  build must not distort it. The plasma glass registers
+//                  the same way - its size is L4PLASMASCALE's business.
 //   the game window  position and size. Nothing derives that size - -res
 //                  only decides how sharp the scene is, and the cockpit
 //                  fits itself to whatever client area it is given - so
diff --git a/MUNGA_L4/L4PLASMASCREEN.cpp b/MUNGA_L4/L4PLASMASCREEN.cpp
index 4b13807..247c1ca 100644
--- a/MUNGA_L4/L4PLASMASCREEN.cpp
+++ b/MUNGA_L4/L4PLASMASCREEN.cpp
@@ -3,6 +3,7 @@
 
 #include "l4plasmascreen.h"
 #include "l4app.h"
+#include "l4mfdview.h"		// RPWindowLayout_*
 
 namespace
 {
@@ -45,6 +46,15 @@ namespace
 			}
 			break;
 
+		case WM_EXITSIZEMOVE:
+			//
+			// Dragged to a new spot. Write the whole arrangement now rather
+			// than trusting teardown, so a hard kill still leaves what was
+			// on screen. No-op unless RP412MFDLAYOUT is save.
+			//
+			RPWindowLayout_Save();
+			return 0;
+
 		case WM_CLOSE:
 			// The glass is part of the cockpit; just hide it.
 			ShowWindow(hwnd, SW_HIDE);
@@ -176,6 +186,7 @@ PlasmaScreen::~PlasmaScreen()
 	}
 	if (window != NULL)
 	{
+		RPWindowLayout_Forget(window);
 		RemovePropA((HWND) window, "PlasmaBitmapInfo");
 		RemovePropA((HWND) window, "PlasmaPixels");
 		DestroyWindow((HWND) window);
@@ -275,6 +286,22 @@ void
 		SetPropA((HWND) window, "PlasmaPixels", pixelBuffer->Data.MapPointer);
 		ShowWindow((HWND) window, SW_SHOWNOACTIVATE);
 		activeInstance = this;
+
+		//
+		//-----------------------------------------------------------
+		// Join the saved layout. Position only, like the display
+		// panes: the glass is 128x32 at L4PLASMASCALE, so its size
+		// is a setting rather than something to drag.
+		//
+		// Loading here rather than leaving it to SVGA16 keeps this
+		// independent of which is built first - the glass comes from
+		// the gauge renderer, the panes from the video mode, and
+		// whichever runs second re-applies a placement the first
+		// already has.
+		//-----------------------------------------------------------
+		//
+		RPWindowLayout_Register(window, "Plasma Display", False);
+		RPWindowLayout_Load();
 	}
 	else
 	{
diff --git a/pack-dist.ps1 b/pack-dist.ps1
index de9a1aa..aa4edc4 100644
--- a/pack-dist.ps1
+++ b/pack-dist.ps1
@@ -179,6 +179,8 @@ L4MFDSPLIT=1
 # old one is never restored over them. Arrange everything once with
 # save, then leave it on load.
 #
+# The plasma display window takes part too, under "Plasma Display".
+#
 # Each line in mfd_layout.cfg reads <title>=<x>,<y>,<w>,<h>, and you can
 # append ,noframe to take that window's title bar and border off - a
 # cockpit that fills the monitor edge to edge without -fit taking the