diff --git a/src/api/layer-set.ts b/src/api/layer-set.ts
index 92262d9b..c436532c 100644
--- a/src/api/layer-set.ts
+++ b/src/api/layer-set.ts
@@ -26,7 +26,7 @@ import Geometry from 'ol/geom/Geometry';
 import UrlTile from 'ol/source/UrlTile';
 import { LoadFunction as TileLoadFunction } from 'ol/Tile';
 import { MapGuideMockMode } from '../components/mapguide-debug-context';
-import { BLANK_GIF_DATA_URI, LAYER_ID_BASE, LAYER_ID_MG_BASE, LAYER_ID_MG_SEL_OVERLAY } from '../constants';
+import { BLANK_GIF_DATA_URI, LAYER_ID_BASE, LAYER_ID_MG_BASE, LAYER_ID_MG_DYNAMIC_OVERLAY, LAYER_ID_MG_SEL_OVERLAY } from '../constants';
 import { OLImageLayer, OLTileLayer } from './ol-types';
 import { IGenericSubjectMapLayer } from '../actions/defs';
 import { GenericLayerSetOL } from './generic-layer-set';
@@ -321,14 +321,19 @@ export class MgLayerSetOL implements ILayerSetOL {
             }
         }
 
+        if (LAYER_ID_MG_DYNAMIC_OVERLAY in trans) {
+            const opacity = restrictToRange(trans[LAYER_ID_MG_DYNAMIC_OVERLAY], 0, 1.0);
+            this.overlay.setOpacity(opacity);
+        } else {
+            this.overlay.setOpacity(1.0);
+        }
+
         if (LAYER_ID_MG_BASE in trans) {
             const opacity = restrictToRange(trans[LAYER_ID_MG_BASE], 0, 1.0);
-            this.overlay.setOpacity(opacity);
             for (const group of this.mgTiledLayers) {
                 group.setOpacity(opacity);
             }
         } else {
-            this.overlay.setOpacity(1.0);
             for (const group of this.mgTiledLayers) {
                 group.setOpacity(1.0);
             }
diff --git a/src/constants.ts b/src/constants.ts
index b41f1f7f..9541f517 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -19,6 +19,10 @@ export const FUSION_REDLINE_NAME = "Redline";
 
 export const LAYER_ID_BASE = "LAYER_ID_BASE";
 export const LAYER_ID_MG_BASE = "LAYER_ID_MG_BASE";
+/**
+ * @since 0.14.8
+ */
+export const LAYER_ID_MG_DYNAMIC_OVERLAY = "LAYER_ID_MG_DYNAMIC_OVERLAY";
 export const LAYER_ID_MG_SEL_OVERLAY = "LAYER_ID_MG_SEL_OVERLAY";
 
 export const BLANK_GIF_DATA_URI = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
\ No newline at end of file
diff --git a/src/containers/viewer-options.tsx b/src/containers/viewer-options.tsx
index 5ba8a3ac..d83e377a 100644
--- a/src/containers/viewer-options.tsx
+++ b/src/containers/viewer-options.tsx
@@ -9,7 +9,7 @@ import { Slider, HTMLSelect } from '@blueprintjs/core';
 import { useActiveMapName, useViewerFeatureTooltipsEnabled, useConfiguredManualFeatureTooltips, useViewerSizeUnits, useViewerLocale, useActiveMapExternalBaseLayers, useViewerIsStateless, useViewerSelectCanDragPan } from './hooks';
 import { setManualFeatureTooltipsEnabled, setFeatureTooltipsEnabled, setLayerTransparency, setViewSizeUnits, enableSelectDragPan } from '../actions/map';
 import { useActiveMapLayerTransparency, useActiveMapState } from './hooks-mapguide';
-import { LAYER_ID_BASE, LAYER_ID_MG_BASE, LAYER_ID_MG_SEL_OVERLAY } from '../constants';
+import { LAYER_ID_BASE, LAYER_ID_MG_BASE, LAYER_ID_MG_DYNAMIC_OVERLAY, LAYER_ID_MG_SEL_OVERLAY } from '../constants';
 import { useReduxDispatch } from "../components/map-providers/context";
 import { isRuntimeMap } from "../utils/type-guards";
 
@@ -42,6 +42,9 @@ export const ViewerOptions = () => {
     const onBaseOpacityChanged = (value: number) => {
         onMgLayerOpacityChanged(mapName, LAYER_ID_BASE, value);
     };
+    const onMgDynamicOverlayOpacityChanged = (value: number) => {
+        onMgLayerOpacityChanged(mapName, LAYER_ID_MG_DYNAMIC_OVERLAY, value);
+    }
     const onMgOpacityChanged = (value: number) => {
         onMgLayerOpacityChanged(mapName, LAYER_ID_MG_BASE, value);
     };
@@ -64,6 +67,7 @@ export const ViewerOptions = () => {
     let opBase = 1.0;
     let opMgBase = 1.0;
     let opMgSelOverlay = 1.0;
+    let opMgDynamicOverlay = 1.0;
     if (layerTransparency) {
         if (LAYER_ID_BASE in layerTransparency) {
             opBase = layerTransparency[LAYER_ID_BASE];
@@ -71,13 +75,19 @@ export const ViewerOptions = () => {
         if (LAYER_ID_MG_BASE in layerTransparency) {
             opMgBase = layerTransparency[LAYER_ID_MG_BASE];
         }
+        if (LAYER_ID_MG_DYNAMIC_OVERLAY in layerTransparency) {
+            opMgDynamicOverlay = layerTransparency[LAYER_ID_MG_DYNAMIC_OVERLAY];
+        }
         if (LAYER_ID_MG_SEL_OVERLAY in layerTransparency) {
             opMgSelOverlay = layerTransparency[LAYER_ID_MG_SEL_OVERLAY];
         }
     }
+    let hasMgBaseLayers = false;
     let isStateless = stateless;
     if (!map) {
         isStateless = true;
+    } else {
+        hasMgBaseLayers = (map.FiniteDisplayScale?.length ?? 0) > 0;
     }
     return <div className="component-viewer-options">
         <h5>{tr("VIEWER_OPTIONS", locale)}</h5>
@@ -113,10 +123,16 @@ export const ViewerOptions = () => {
                     </label>;
                 }
             })()}
+            {hasMgBaseLayers && <label className="bp3-label noselect">
+                {tr("LAYER_ID_MG_BASE_LAYERS", locale)}
+                <div style={{ paddingLeft: 8, paddingRight: 8 }}>
+                    <Slider min={0} max={1.0} stepSize={0.01} value={opMgBase} onChange={onMgOpacityChanged} />
+                </div>
+            </label>}
             <label className="bp3-label noselect">
                 {map ? tr("LAYER_ID_MG_BASE", locale) : tr("LAYER_ID_SUBJECT", locale)}
                 <div style={{ paddingLeft: 8, paddingRight: 8 }}>
-                    <Slider min={0} max={1.0} stepSize={0.01} value={opMgBase} onChange={onMgOpacityChanged} />
+                    <Slider min={0} max={1.0} stepSize={0.01} value={opMgDynamicOverlay} onChange={onMgDynamicOverlayOpacityChanged} />
                 </div>
             </label>
             {!isStateless && <label className="bp3-label noselect">
diff --git a/src/strings/en.ts b/src/strings/en.ts
index 9e969344..07f6e7c8 100644
--- a/src/strings/en.ts
+++ b/src/strings/en.ts
@@ -17,6 +17,7 @@ export const STRINGS_EN: ILocalizedMessages = {
     "LAYER_ID_MG_BASE": "MapGuide Map",
     "LAYER_ID_SUBJECT": "Subject Layer",
     "LAYER_ID_MG_SEL_OVERLAY": "MapGuide Selection Overlay",
+    "LAYER_ID_MG_BASE_LAYERS": "MapGuide Base Layers",
     "UNKNOWN_WIDGET": "This button references an unknown or unsupported widget: {widget}",
     "UNKNOWN_COMMAND_REFERENCE": "This button references an unknown command or unsupported: {command}",
     "INIT": "Initializing",
diff --git a/src/strings/msgdef.ts b/src/strings/msgdef.ts
index d53c2638..65d13c6d 100644
--- a/src/strings/msgdef.ts
+++ b/src/strings/msgdef.ts
@@ -25,6 +25,7 @@ export interface ILocalizedMessages {
     LAYER_ID_MG_BASE: string;
     LAYER_ID_SUBJECT: string;
     LAYER_ID_MG_SEL_OVERLAY: string;
+    LAYER_ID_MG_BASE_LAYERS: string;
     UNKNOWN_WIDGET: string;
     UNKNOWN_COMMAND_REFERENCE: string;
     INIT: string;
diff --git a/viewer/strings/de.json b/viewer/strings/de.json
index d89f19a2..b80594de 100644
--- a/viewer/strings/de.json
+++ b/viewer/strings/de.json
@@ -7,6 +7,7 @@
     "LAYER_ID_BASE": "Grundschicht",
     "LAYER_ID_MG_BASE": "MapGuide Karte",
     "LAYER_ID_MG_SEL_OVERLAY": "MapGuide Selection Overlay",
+    "LAYER_ID_MG_BASE_LAYERS": "MapGuide-Basislayer",
     "UNKNOWN_WIDGET": "Diese Schaltfläche verweist auf einen unbekannten oder nicht unterstützten Widget: {widget}",
     "UNKNOWN_COMMAND_REFERENCE": "Diese Schaltfläche verweist auf einen unbekannten Befehl oder nicht unterstützt: {command}",
     "INIT": "Initialisierung",