NotebookDocumentShowOptions#selections.

src/vs/vscode.proposed.d.ts

@@ -1299,7 +1299,7 @@ declare module 'vscode' {
 		viewColumn?: ViewColumn;
 		preserveFocus?: boolean;
 		preview?: boolean;
-		selection?: NotebookCellRange;
+		selections?: NotebookCellRange[];
 	}
 
 	export namespace notebook {

src/vs/workbench/api/browser/mainThreadNotebookEditors.ts

@@ -130,7 +130,7 @@ export class MainThreadNotebookEditors implements MainThreadNotebookEditorsShape
 
 	async $tryShowNotebookDocument(resource: UriComponents, viewType: string, options: INotebookDocumentShowOptions): Promise<string> {
 		const editorOptions = new NotebookEditorOptions({
-			cellSelections: options.selection && [options.selection],
+			cellSelections: options.selections,
 			preserveFocus: options.preserveFocus,
 			pinned: options.pinned,
 			// selection: options.selection,

src/vs/workbench/api/common/extHost.protocol.ts

@@ -861,7 +861,7 @@ export interface INotebookDocumentShowOptions {
 	position?: EditorGroupColumn;
 	preserveFocus?: boolean;
 	pinned?: boolean;
-	selection?: ICellRange;
+	selections?: ICellRange[];
 }
 
 export type INotebookCellStatusBarEntryDto = Dto<INotebookCellStatusBarEntry>;

src/vs/workbench/api/common/extHostNotebook.ts

@@ -416,7 +416,7 @@ export class ExtHostNotebookController implements ExtHostNotebookShape {
 			resolvedOptions = {
 				position: typeConverters.ViewColumn.from(options.viewColumn),
 				preserveFocus: options.preserveFocus,
-				selection: options.selection && typeConverters.NotebookCellRange.from(options.selection),
+				selections: options.selections && options.selections.map(typeConverters.NotebookCellRange.from),
 				pinned: typeof options.preview === 'boolean' ? !options.preview : undefined
 			};
 		} else {