diff --git a/src/components/modals/DialogFrame.tsx b/src/components/modals/DialogFrame.tsx
index c7ee38b..dcdfd9f 100644
--- a/src/components/modals/DialogFrame.tsx
+++ b/src/components/modals/DialogFrame.tsx
@@ -95,7 +95,7 @@ export function DialogFrame({
           >
             <div
               className={cn(
-                'border-b border-neutral-200 px-6 py-4 dark:border-[#2d3540]',
+                'shrink-0 border-b border-neutral-200 px-6 py-4 dark:border-[#2d3540]',
                 headerClassName
               )}
             >
@@ -166,7 +166,7 @@ export function DialogFrame({
             {footer && (
               <div
                 className={cn(
-                  'flex flex-wrap items-center justify-end gap-2 border-t border-neutral-200 bg-neutral-50 px-6 py-4',
+                  'flex shrink-0 flex-wrap items-center justify-end gap-2 border-t border-neutral-200 bg-neutral-50 px-6 py-4',
                   'dark:border-[#2d3540] dark:bg-[#1e252e]',
                   footerClassName
                 )}
diff --git a/src/components/modals/ModelViewDialog.tsx b/src/components/modals/ModelViewDialog.tsx
new file mode 100644
index 0000000..e86cf1a
--- /dev/null
+++ b/src/components/modals/ModelViewDialog.tsx
@@ -0,0 +1,136 @@
+import { useState, type ReactNode } from 'react';
+import { Database, ExternalLink, Maximize2, Minimize2 } from 'lucide-react';
+import { DialogFrame, type DialogFrameSize } from '@/components/modals/DialogFrame';
+import { ImageWithFallback } from '@/components/ui/ImageWithFallback';
+import { cn } from '@/utils/cn';
+
+export interface ModelViewDialogProps {
+  isOpen: boolean;
+  onClose: () => void;
+  schemaUrl: string;
+  title: ReactNode;
+  description?: ReactNode;
+  icon?: ReactNode;
+  size?: DialogFrameSize;
+  sourceLabel?: string;
+  previewSummary?: ReactNode;
+  backgroundNotice?: ReactNode;
+}
+
+export function ModelViewDialog({
+  isOpen,
+  onClose,
+  schemaUrl,
+  title,
+  description,
+  icon,
+  size = 'full',
+  sourceLabel = 'Open source',
+  previewSummary = 'SVG preview of the current backend schema.',
+  backgroundNotice = 'Some hosts block embedded frame previews. This dialog uses image preview mode for compatibility.',
+}: ModelViewDialogProps) {
+  // Schema diagrams range from ~520px to ~1830px wide, so the preview fits the
+  // stage by default and only scrolls at natural size when the user opts in.
+  const [isActualSize, setIsActualSize] = useState(false);
+
+  const handleClose = () => {
+    setIsActualSize(false);
+    onClose();
+  };
+
+  const altText = typeof title === 'string' ? title : 'Backend model schema';
+
+  return (
+    <DialogFrame
+      isOpen={isOpen}
+      onClose={handleClose}
+      title={title}
+      description={description}
+      icon={icon ?? <Database className='h-5 w-5' />}
+      size={size}
+      // Bound the panel to the viewport (the frame adds p-4 around it) and lay it
+      // out as a column so only the preview stage absorbs the leftover height.
+      panelClassName='flex max-h-[calc(100dvh-2rem)] flex-col'
+      bodyClassName='flex min-h-0 flex-col space-y-0 p-0'
+    >
+      <div className='flex shrink-0 items-center justify-between gap-3 border-b border-neutral-200 bg-neutral-50 px-4 py-3 dark:border-[#2d3540] dark:bg-[#1e252e]'>
+        <p className='min-w-0 truncate text-sm text-slate-600 dark:text-[#9dabb9]'>
+          {previewSummary}
+        </p>
+
+        <div className='flex shrink-0 items-center gap-3'>
+          <button
+            type='button'
+            onClick={() => setIsActualSize((current) => !current)}
+            aria-pressed={isActualSize}
+            className={cn(
+              'inline-flex items-center gap-1.5 rounded-md border border-neutral-200 px-2 py-1',
+              'text-xs font-medium text-slate-600 transition-colors',
+              'hover:bg-neutral-100 hover:text-slate-900',
+              'focus:ring-2 focus:ring-blue-500 focus:outline-none',
+              'dark:border-[#2d3540] dark:text-[#9dabb9] dark:hover:bg-[#111418] dark:hover:text-slate-100'
+            )}
+          >
+            {isActualSize ? (
+              <Minimize2 className='h-3.5 w-3.5' />
+            ) : (
+              <Maximize2 className='h-3.5 w-3.5' />
+            )}
+            {isActualSize ? 'Fit to window' : 'Actual size'}
+          </button>
+
+          <a
+            href={schemaUrl}
+            target='_blank'
+            rel='noopener noreferrer'
+            className='inline-flex items-center gap-1 text-sm font-medium text-blue-600 hover:underline dark:text-blue-400'
+          >
+            {sourceLabel}
+            <ExternalLink className='h-4 w-4' />
+          </a>
+        </div>
+      </div>
+
+      {/* basis-[70vh] is the preferred stage height; min-h-0 lets it shrink
+          instead of pushing the panel past its max-height on short viewports. */}
+      <div
+        className={cn(
+          'relative min-h-0 basis-[70vh] bg-white dark:bg-[#111418]',
+          isActualSize ? 'overflow-auto' : 'overflow-hidden'
+        )}
+      >
+        {isActualSize ? (
+          // min-w-max keeps the centred diagram from overflowing past the
+          // scroll container's start edge, which would make it unreachable.
+          <a
+            href={schemaUrl}
+            target='_blank'
+            rel='noopener noreferrer'
+            className='flex min-h-full min-w-max items-center justify-center p-3'
+          >
+            <ImageWithFallback src={schemaUrl} alt={altText} className='block max-w-none' />
+          </a>
+        ) : (
+          // Absolute inset-0 gives the image a definite box in both axes, so
+          // object-contain can scale the diagram down to fit rather than clip.
+          <a
+            href={schemaUrl}
+            target='_blank'
+            rel='noopener noreferrer'
+            className='absolute inset-0 flex items-center justify-center p-3'
+          >
+            <ImageWithFallback
+              src={schemaUrl}
+              alt={altText}
+              className='block h-full w-full object-contain'
+            />
+          </a>
+        )}
+      </div>
+
+      <div className='shrink-0 border-t border-neutral-200 bg-neutral-50 px-4 py-2 dark:border-[#2d3540] dark:bg-[#1e252e]'>
+        <p className='text-xs text-slate-500 dark:text-[#9dabb9]'>{backgroundNotice}</p>
+      </div>
+    </DialogFrame>
+  );
+}
diff --git a/src/features/cases/components/CasesInfoDrawer.tsx b/src/features/cases/components/CasesInfoDrawer.tsx
index ea3120c..f49b281 100644
--- a/src/features/cases/components/CasesInfoDrawer.tsx
+++ b/src/features/cases/components/CasesInfoDrawer.tsx
@@ -1,7 +1,8 @@
 import { useState } from 'react';
-import { Briefcase, FolderSync } from 'lucide-react';
+import { Briefcase, Database, FolderSync } from 'lucide-react';
 import { DrawerFrame } from '@/components/modals/DrawerFrame';
 import { InfoDrawerActionCard } from '@/components/modals/InfoDrawerActionCard';
+import { ModelViewDialog } from '@/components/modals/ModelViewDialog';
 import { formatTableDate } from '@/utils/timeFormat';
 import { useCaseSyncFromRedcapAutoHistoryModel } from '../api/cases.api';
 // Manual case creation is temporarily unavailable because the Case Manager API
@@ -16,12 +17,16 @@ interface CasesInfoDrawerProps {
   onClose: () => void;
 }
 
+const CASE_MANAGER_SCHEMA_SVG_URL =
+  'https://raw.githubusercontent.com/OrcaBus/service-case-manager/refs/heads/main/case-manager/docs/schema.drawio.svg';
+
 export function CasesInfoDrawer({ isOpen, onClose }: CasesInfoDrawerProps) {
   // Manual case creation is temporarily unavailable. Preserve this state for
   // restoration alongside AddCaseModal when POST /case/ returns.
   // const [showAddCaseModal, setShowAddCaseModal] = useState(false);
   const [showAutoImportModal, setShowAutoImportModal] = useState(false);
   const [showSyncHistoryModal, setShowSyncHistoryModal] = useState(false);
+  const [showSchemaPreviewModal, setShowSchemaPreviewModal] = useState(false);
 
   const {
     data: syncHistoryData,
@@ -78,6 +83,15 @@ export function CasesInfoDrawer({ isOpen, onClose }: CasesInfoDrawerProps) {
               buttonIcon={<FolderSync className='h-4 w-4' />}
               variant='secondary'
             />
+            <InfoDrawerActionCard
+              title='Case Model View'
+              description='Preview the Case Manager model entity relationship diagram used to model case data.'
+              buttonLabel='Case Model View'
+              onClick={() => setShowSchemaPreviewModal(true)}
+              icon={<Database className='h-4 w-4' />}
+              buttonIcon={<Database className='h-4 w-4' />}
+              variant='secondary'
+            />
             {/* Manual case creation is temporarily unavailable because the Case Manager API
                 no longer exposes POST /case/. Restore this card with AddCaseModal when
                 collection create support returns.
@@ -105,6 +119,17 @@ export function CasesInfoDrawer({ isOpen, onClose }: CasesInfoDrawerProps) {
         isOpen={showAutoImportModal}
         onClose={() => setShowAutoImportModal(false)}
       />
+
+      <ModelViewDialog
+        isOpen={showSchemaPreviewModal}
+        onClose={() => setShowSchemaPreviewModal(false)}
+        schemaUrl={CASE_MANAGER_SCHEMA_SVG_URL}
+        title='Case Manager Entity Schema'
+        description='Case Manager model entity diagram from service-case-manager.'
+        icon={<Database className='h-5 w-5' />}
+        previewSummary='SVG preview of the current Case Manager model schema.'
+        backgroundNotice='This source is theme-aware, so dark mode can render a dark canvas background.'
+      />
     </DrawerFrame>
   );
 }
diff --git a/src/features/cases/components/__tests__/CaseDetailsOverviewCard.test.tsx b/src/features/cases/components/__tests__/CaseDetailsOverviewCard.test.tsx
index 9a1e078..1ae79d4 100644
--- a/src/features/cases/components/__tests__/CaseDetailsOverviewCard.test.tsx
+++ b/src/features/cases/components/__tests__/CaseDetailsOverviewCard.test.tsx
@@ -23,6 +23,7 @@ const caseDetail: CaseDetailModel = {
   isNataAccredited: true,
   alias: ['CASE-ALIAS'],
   links: {},
+  redcapPayload: {},
   dueDate: '2026-08-31',
   externalEntitySet: [],
   userSet: [],
diff --git a/src/features/cases/components/__tests__/EditCaseModal.test.tsx b/src/features/cases/components/__tests__/EditCaseModal.test.tsx
index ed5f04e..9c36488 100644
--- a/src/features/cases/components/__tests__/EditCaseModal.test.tsx
+++ b/src/features/cases/components/__tests__/EditCaseModal.test.tsx
@@ -41,6 +41,7 @@ const caseDetail: CaseDetailModel = {
   isNataAccredited: false,
   alias: ['CASE-ALIAS'],
   links: { trello: 'https://example.com/card' },
+  redcapPayload: {},
   dueDate: '2026-08-31',
   externalEntitySet: [],
   userSet: [],
diff --git a/src/features/lab/root/components/LabInfoDrawer.tsx b/src/features/lab/root/components/LabInfoDrawer.tsx
index 40e2430..166499f 100644
--- a/src/features/lab/root/components/LabInfoDrawer.tsx
+++ b/src/features/lab/root/components/LabInfoDrawer.tsx
@@ -1,7 +1,8 @@
 import { useState } from 'react';
-import { LibraryBig, RefreshCw } from 'lucide-react';
+import { Database, LibraryBig, RefreshCw } from 'lucide-react';
 import { DrawerFrame } from '@/components/modals/DrawerFrame';
 import { InfoDrawerActionCard } from '@/components/modals/InfoDrawerActionCard';
+import { ModelViewDialog } from '@/components/modals/ModelViewDialog';
 import { SyncMetadataModal } from './SyncMetadataModal';
 
 interface LabInfoDrawerProps {
@@ -9,8 +10,12 @@ interface LabInfoDrawerProps {
   onClose: () => void;
 }
 
+const METADATA_MANAGER_SCHEMA_SVG_URL =
+  'https://github.com/OrcaBus/service-metadata-manager/raw/refs/heads/main/metadata-manager/docs/schema.drawio.svg';
+
 export function LabInfoDrawer({ isOpen, onClose }: LabInfoDrawerProps) {
   const [showSyncModal, setShowSyncModal] = useState(false);
+  const [showModelViewModal, setShowModelViewModal] = useState(false);
 
   return (
     <>
@@ -32,7 +37,7 @@ export function LabInfoDrawer({ isOpen, onClose }: LabInfoDrawerProps) {
 
           <section>
             <h3 className='text-sm font-semibold text-slate-900 dark:text-white'>Actions</h3>
-            <div className='mt-3'>
+            <div className='mt-3 space-y-3'>
               <InfoDrawerActionCard
                 title='Sync metadata'
                 description='Refresh lab metadata from upstream sources so library fields, phenotypes, and workflow links stay current.'
@@ -43,12 +48,33 @@ export function LabInfoDrawer({ isOpen, onClose }: LabInfoDrawerProps) {
                 icon={<LibraryBig className='h-4 w-4' />}
                 buttonIcon={<RefreshCw className='h-4 w-4' />}
               />
+
+              <InfoDrawerActionCard
+                title='Lab Model View'
+                description='Preview the Metadata Manager backend entity relationship diagram for lab metadata.'
+                buttonLabel='Lab Model View'
+                onClick={() => setShowModelViewModal(true)}
+                icon={<Database className='h-4 w-4' />}
+                buttonIcon={<Database className='h-4 w-4' />}
+                variant='secondary'
+              />
             </div>
           </section>
         </div>
       </DrawerFrame>
 
       <SyncMetadataModal isOpen={showSyncModal} onClose={() => setShowSyncModal(false)} />
+
+      <ModelViewDialog
+        isOpen={showModelViewModal}
+        onClose={() => setShowModelViewModal(false)}
+        schemaUrl={METADATA_MANAGER_SCHEMA_SVG_URL}
+        title='Metadata Manager Entity Schema'
+        description='Metadata Manager model entity diagram from service-metadata-manager.'
+        icon={<Database className='h-5 w-5' />}
+        previewSummary='SVG preview of the current Metadata Manager model schema.'
+        backgroundNotice='This source is theme-aware, so dark mode can render a dark canvas background.'
+      />
     </>
   );
 }
diff --git a/src/features/runs/sequence-runs/pages/SequenceRunsPage.tsx b/src/features/runs/sequence-runs/pages/SequenceRunsPage.tsx
index 1a9967e..9aa6223 100644
--- a/src/features/runs/sequence-runs/pages/SequenceRunsPage.tsx
+++ b/src/features/runs/sequence-runs/pages/SequenceRunsPage.tsx
@@ -9,6 +9,9 @@ import { buildSequenceRunsFilterBadges } from '../utils/buildSequenceRunsFilterB
 import { SequenceRunsStatusCards } from '../components/SequenceRunsStatusCards';
 import SequenceRunsTable from '../components/SequenceRunsTable';
 
+const SEQUENCE_RUN_MANAGER_SCHEMA_SVG_URL =
+  'https://raw.githubusercontent.com/OrcaBus/service-sequence-run-manager/refs/heads/main/docs/diagram/sequence-run-manager-entity-diagram.drawio.svg';
+
 export function SequenceRunsPage() {
   const title = 'Sequence Runs';
   const description = 'Monitor instrument runs and sequencing run status.';
@@ -134,6 +137,13 @@ export function SequenceRunsPage() {
         onClose={closeInfoDrawer}
         title={title}
         description={description}
+        modelSchema={{
+          url: SEQUENCE_RUN_MANAGER_SCHEMA_SVG_URL,
+          title: 'Sequence Run Manager Entity Schema',
+          description:
+            'Sequence Run Manager model entity diagram from service-sequence-run-manager.',
+          previewSummary: 'SVG preview of the current Sequence Run Manager model schema.',
+        }}
       />
     </>
   );
diff --git a/src/features/runs/shared/components/RunsInfoDrawer.tsx b/src/features/runs/shared/components/RunsInfoDrawer.tsx
index bac0821..387ff2a 100644
--- a/src/features/runs/shared/components/RunsInfoDrawer.tsx
+++ b/src/features/runs/shared/components/RunsInfoDrawer.tsx
@@ -1,28 +1,79 @@
-import { Activity } from 'lucide-react';
+import { useState } from 'react';
+import { Activity, Database } from 'lucide-react';
 import { DrawerFrame } from '@/components/modals/DrawerFrame';
+import { InfoDrawerActionCard } from '@/components/modals/InfoDrawerActionCard';
+import { ModelViewDialog } from '@/components/modals/ModelViewDialog';
 
 interface RunsInfoDrawerProps {
   isOpen: boolean;
   onClose: () => void;
   title: string;
   description: string;
+  modelSchema?: {
+    url: string;
+    title: string;
+    description: string;
+    previewSummary: string;
+  };
 }
 
-export function RunsInfoDrawer({ isOpen, onClose, title, description }: RunsInfoDrawerProps) {
+export function RunsInfoDrawer({
+  isOpen,
+  onClose,
+  title,
+  description,
+  modelSchema,
+}: RunsInfoDrawerProps) {
+  const [showModelViewModal, setShowModelViewModal] = useState(false);
+
   return (
-    <DrawerFrame
-      isOpen={isOpen}
-      onClose={onClose}
-      title={title}
-      icon={<Activity className='h-5 w-5' />}
-      size='md'
-    >
-      <section>
-        <h3 className='text-sm font-semibold text-slate-900 dark:text-white'>Description</h3>
-        <p className='mt-2 text-sm leading-relaxed text-slate-600 dark:text-[#9dabb9]'>
-          {description}
-        </p>
-      </section>
-    </DrawerFrame>
+    <>
+      <DrawerFrame
+        isOpen={isOpen}
+        onClose={onClose}
+        title={title}
+        icon={<Activity className='h-5 w-5' />}
+        size='md'
+      >
+        <div className='space-y-6'>
+          <section>
+            <h3 className='text-sm font-semibold text-slate-900 dark:text-white'>Description</h3>
+            <p className='mt-2 text-sm leading-relaxed text-slate-600 dark:text-[#9dabb9]'>
+              {description}
+            </p>
+          </section>
+
+          {modelSchema && (
+            <section>
+              <h3 className='text-sm font-semibold text-slate-900 dark:text-white'>Actions</h3>
+              <div className='mt-3'>
+                <InfoDrawerActionCard
+                  title='Model Schema View'
+                  description='Preview the backend entity relationship diagram for this runs domain.'
+                  buttonLabel='Model Schema View'
+                  onClick={() => setShowModelViewModal(true)}
+                  icon={<Database className='h-4 w-4' />}
+                  buttonIcon={<Database className='h-4 w-4' />}
+                  variant='secondary'
+                />
+              </div>
+            </section>
+          )}
+        </div>
+      </DrawerFrame>
+
+      {modelSchema && (
+        <ModelViewDialog
+          isOpen={showModelViewModal}
+          onClose={() => setShowModelViewModal(false)}
+          schemaUrl={modelSchema.url}
+          title={modelSchema.title}
+          description={modelSchema.description}
+          icon={<Database className='h-5 w-5' />}
+          previewSummary={modelSchema.previewSummary}
+          backgroundNotice='This source is theme-aware, so dark mode can render a dark canvas background.'
+        />
+      )}
+    </>
   );
 }
diff --git a/src/features/runs/workflow-runs/pages/WorkflowRunsPage.tsx b/src/features/runs/workflow-runs/pages/WorkflowRunsPage.tsx
index 7251c63..0313964 100644
--- a/src/features/runs/workflow-runs/pages/WorkflowRunsPage.tsx
+++ b/src/features/runs/workflow-runs/pages/WorkflowRunsPage.tsx
@@ -9,6 +9,9 @@ import WorkflowRunsTable from '../components/WorkflowRunsTable';
 import { buildWorkflowRunsFilterBadges } from '../utils/buildWorkflowRunsFilterBadges';
 import { WorkflowRunsStatsCards } from '../components/WorkflowRunsStatsCards';
 
+const WORKFLOW_MANAGER_SCHEMA_SVG_URL =
+  'https://raw.githubusercontent.com/OrcaBus/service-workflow-manager/refs/heads/main/docs/diagrams/workflow-manager-entity-diagram.drawio.svg';
+
 export function WorkflowRunsPage() {
   const title = 'Workflow Runs';
   const description = 'Monitor workflow executions, run states, and related operational metadata.';
@@ -112,6 +115,12 @@ export function WorkflowRunsPage() {
         onClose={closeInfoDrawer}
         title={title}
         description={description}
+        modelSchema={{
+          url: WORKFLOW_MANAGER_SCHEMA_SVG_URL,
+          title: 'Workflow Manager Entity Schema',
+          description: 'Workflow model entity diagram from service-workflow-manager.',
+          previewSummary: 'SVG preview of the current Workflow Manager model schema.',
+        }}
       />
     </>
   );