diff --git a/src/vs/workbench/contrib/notebook/browser/view/renderers/codeCell.ts b/src/vs/workbench/contrib/notebook/browser/view/renderers/codeCell.ts
index d7d140fc79e..521e021e4a7 100644
--- a/src/vs/workbench/contrib/notebook/browser/view/renderers/codeCell.ts
+++ b/src/vs/workbench/contrib/notebook/browser/view/renderers/codeCell.ts
@@ -286,7 +286,7 @@ export class CodeCell extends Disposable {
 				const mimeTypePicker = DOM.$('.multi-mimetype-output');
 				DOM.addClasses(mimeTypePicker, 'codicon', 'codicon-code');
 				mimeTypePicker.tabIndex = 0;
-				mimeTypePicker.title = nls.localize('mimeTypePicker', "Choose a different output mimetype");
+				mimeTypePicker.title = nls.localize('mimeTypePicker', "Choose a different output mimetype, available mimetypes: {0}", transformedDisplayOutput.orderedMimeTypes.map(mimeType => mimeType.mimeType).join(', '));
 				outputItemDiv.appendChild(mimeTypePicker);
 				this.outputResizeListeners.get(currOutput)!.add(DOM.addStandardDisposableListener(mimeTypePicker, 'mousedown', async e => {
 					if (e.leftButton) {