diff --git a/types/forge-viewer/index.d.ts b/types/forge-viewer/index.d.ts
index d0e358b10b..e8f43acec9 100644
--- a/types/forge-viewer/index.d.ts
+++ b/types/forge-viewer/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for non-npm package Forge Viewer 7.0
+// Type definitions for non-npm package Forge Viewer 7.4
 // Project: https://forge.autodesk.com/en/docs/viewer/v7/reference/javascript/viewer3d/
 // Definitions by: Autodesk Forge Partner Development <https://github.com/Autodesk-Forge>, Alan Smith <https://github.com/alansmithnbs>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -377,6 +377,8 @@ declare namespace Autodesk {
             acmSessionId: string;
             myData: any;
 
+            downloadAecModelData(onFinished?: (data: any) => void): Promise<any>;
+            getAecModelData(node: BubbleNode): any;
             getFullPath(urn: string): string;
             getItemById(id: string): object;
             getMessages(itemId: string, excludeGlobal: boolean): object;
@@ -469,6 +471,7 @@ declare namespace Autodesk {
         }
 
         class Model {
+            id: number;
             visibilityManager: Private.VisibilityManager;
 
             clearThemingColors(): void;
@@ -558,6 +561,7 @@ declare namespace Autodesk {
             getScreenViewport(): ClientRect;
             setScreenViewport(viewport: ClientRect): void;
             setView(position: THREE.Vector3, target: THREE.Vector3): void;
+            setVerticalFov(fov: number, adjustPosition: boolean): void;
             setUseLeftHandedInput(value: boolean): any;
             setZoomTowardsPivot(value: boolean): any;
         }
@@ -647,10 +651,13 @@ declare namespace Autodesk {
             canvas: HTMLCanvasElement;
             container: Element;
             navigation: Navigation;
+            id: number;
             impl: Private.Viewer3DImpl;
             model: Model;
+            started: boolean;
+            toolbar: UI.ToolBar;
 
-            start(urn: string, onSuccesfullCallback?: () => void, onErrorCallback?: (errorCode: number, errorMessage: string, statusCode: number, statusText: string) => void): any;
+            start(urn?: string, onSuccesfullCallback?: () => void, onErrorCallback?: (errorCode: number, errorMessage: string, statusCode: number, statusText: string) => void): any;
             startWithDocumentNode(avDocument: Document, manifestNode: any, options: object): Promise<void>;
             registerUniversalHotkeys(): void;
             createControls(): void;
@@ -669,7 +676,7 @@ declare namespace Autodesk {
             onModelAdded(model: Model, preserveTools: boolean): void;
             loadModel(url: string, options: object, onSuccessCallback?: (model: Model) => void, onErrorCallback?: (errorCode: number, errorMessage: string, errorArgs: any) => void): any;
             unloadModel(model: Model): void;
-            loadDocumentNode(avDocument: Document, manifestNode: any/*BubbleNode*/, options: object): Promise<Model>;
+            loadDocumentNode(avDocument: Document, manifestNode: any/*BubbleNode*/, options?: object): Promise<Model>;
             unloadDocumentNode(manifestNode: any/*BubbleNode*/): boolean;
             getDimensions(): Private.Dimensions;
             resize(): void;
@@ -691,7 +698,7 @@ declare namespace Autodesk {
             search(text: string, onSuccess: any, onError: any, attributeNames: string[]): void;
             getHiddenNodes(): number[];
             getIsolatedNodes(): number[];
-            isolate(node: number[]|number, model?: Model): void;
+            isolate(node?: number[]|number, model?: Model): void;
             setBackgroundColor(red: number, green: number, blue: number, red2: number, green2: number, blue2: number): void;
             toggleSelect(dbId: number, model: Model, selectionType: number): void;
             select(dbIds: number[]|number, model?: Model, selectionType?: number): void;
@@ -779,9 +786,7 @@ declare namespace Autodesk {
             leaveLiveReview(): void;
             setModelUnits(modelUnits: any): void;
             worldToClient(pt: THREE.Vector3): THREE.Vector3;
-            clientToWorld(clientX: number, clientY: number, ignoreTransparent: boolean):
-                | null
-                | (Partial<Private.HitTestResult> & { point: THREE.Vector3, model: Model });
+            clientToWorld(clientX: number, clientY: number, ignoreTransparent: boolean): object;
             modelHasTopology(): boolean;
             setSelectionColor(col: THREE.Color, selectionType: number): void;
             set2dSelectionColor(col: THREE.Color, opacity: number): void;
@@ -1075,6 +1080,7 @@ declare namespace Autodesk {
             addEventListener(target: object, eventId: string, callback: () => void): void;
             addVisibilityListener(callback: (state: boolean) => void): void;
             createCloseButton(): HTMLElement;
+            createFooter(): HTMLElement;
             createScrollContainer(options: ScrollContainerOptions): void;
             createTitleBar(title: string): HTMLElement;
             getContainerBoundingRect(): ClientRect;