diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcdf270..2dacda5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 1.51.0 (Release on 24 October 2022)
+
+- Always render on save for notebooks (as they don't execute by default)
+- Improved slide preview for notebooks (return last slide)
+
 ## 1.50.0 (Release on 19 October 2022)
 
 - Run only selected text for non-empty editor selections
diff --git a/README.md b/README.md
index 166f64a..721ec58 100644
--- a/README.md
+++ b/README.md
@@ -223,12 +223,12 @@ document front-matter, option names/values use YAML syntax.
 
 You can alternatively download and install the extension from the command line as follows:
 
-1.  Download the extension file: [Quarto VS Code (VSIX)](https://github.com/quarto-dev/quarto-vscode/raw/main/visx/quarto-1.50.0.vsix)
+1.  Download the extension file: [Quarto VS Code (VSIX)](https://github.com/quarto-dev/quarto-vscode/raw/main/visx/quarto-1.51.0.vsix)
 
 2.  Install from the command line with:
 
     ```bash
-    code --install-extension quarto-1.50.0.vsix
+    code --install-extension quarto-1.51.0.vsix
     ```
 
 Note that in order to use the `code` command to perform the installation you may need to open the VS Code Command Palette (Ctrl+Shift+P) and type "shell command" to execute the `Shell Command: Install 'code' command in PATH` command. This will make sure that `code` can be invoked from the command line on your system.
diff --git a/assets/www/preview/index.js b/assets/www/preview/index.js
index 772cd1f..ef90d76 100644
--- a/assets/www/preview/index.js
+++ b/assets/www/preview/index.js
@@ -23,7 +23,7 @@ const reloadButton = header.querySelector(".reload-button");
 const openExternalButton = header.querySelector(".open-external-button");
 const kQuartoPreviewReqId = "quartoPreviewReqId";
 const kQuartoPreviewThemeCategory = "quartoPreviewThemeCategory";
-let slideIndex = 0;
+let slideIndex = undefined;
 
 const updateAddressBar = (href) => {
   const url = new URL(href);
@@ -76,18 +76,20 @@ window.addEventListener("message", (e) => {
       break;
     }
     case "setSlideIndex": {
-      slideIndex = e.data.index || 0;
+      slideIndex = e.data.index;
       break;
     }
     case "reveal-init": {
       // set the slide index
       const slides = e.data.data.slides;
-      const slide = slides[slideIndex];
-      if (slide) {
-        e.source.postMessage(
-          { message: "reveal-slide", data: slide },
-          e.origin
-        );
+      if (slideIndex !== undefined) {
+        const slide = slides[slideIndex];
+        if (slide) {
+          e.source.postMessage(
+            { message: "reveal-slide", data: slide },
+            e.origin
+          );
+        }
       }
 
       // let reveal know we are ready for additional messages
diff --git a/package.json b/package.json
index 65efb8e..c95a2a3 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "pandoc",
     "quarto"
   ],
-  "version": "1.50.0",
+  "version": "1.51.0",
   "repository": {
     "type": "git",
     "url": "https://github.com/quarto-dev/quarto-vscode.git"
diff --git a/src/providers/preview/preview-util.ts b/src/providers/preview/preview-util.ts
index efa7585..bc72127 100644
--- a/src/providers/preview/preview-util.ts
+++ b/src/providers/preview/preview-util.ts
@@ -107,6 +107,11 @@ export async function renderOnSave(engine: MarkdownEngine, editor: TextEditor) {
     return false;
   }
 
+  // notebooks automatically get renderOnSave
+  if (isNotebook(editor.document)) {
+    return true;
+  }
+
   // first look for document level editor setting
   const docYaml = await documentFrontMatter(engine, editor.document);
   const docSetting = readRenderOnSave(docYaml);
diff --git a/src/providers/preview/preview-webview.ts b/src/providers/preview/preview-webview.ts
index 2f465e7..a6851e6 100644
--- a/src/providers/preview/preview-webview.ts
+++ b/src/providers/preview/preview-webview.ts
@@ -22,7 +22,7 @@ export class QuartoPreviewWebviewManager extends QuartoWebviewManager<
       this.activeView_.clear();
     }
   }
-  public setSlideIndex(slideIndex: number) {
+  public setSlideIndex(slideIndex?: number) {
     if (this.activeView_) {
       this.activeView_.setSlideIndex(slideIndex);
     }
@@ -102,7 +102,7 @@ export class QuartoPreviewWebview extends QuartoWebview<string> {
     });
   }
 
-  public setSlideIndex(slideIndex: number) {
+  public setSlideIndex(slideIndex?: number) {
     this._webviewPanel.webview.postMessage({
       type: "setSlideIndex",
       index: slideIndex,
diff --git a/src/providers/preview/preview.ts b/src/providers/preview/preview.ts
index 88e6df7..c2a16b6 100644
--- a/src/providers/preview/preview.ts
+++ b/src/providers/preview/preview.ts
@@ -154,6 +154,8 @@ export async function previewDoc(
       previewManager.setSlideIndex(
         await revealSlideIndex(editor.selection.active, editor.document, engine)
       );
+    } else {
+      previewManager.setSlideIndex(undefined);
     }
   }
   //  set onShow if provided
@@ -263,7 +265,7 @@ class PreviewManager {
     }
   }
 
-  public setSlideIndex(slideIndex: number) {
+  public setSlideIndex(slideIndex?: number) {
     this.webviewManager_.setSlideIndex(slideIndex);
   }
 
diff --git a/visx/quarto-1.50.0.vsix b/visx/quarto-1.51.0.vsix
similarity index 86%
rename from visx/quarto-1.50.0.vsix
rename to visx/quarto-1.51.0.vsix
index 93099a0..67ae4b6 100644
Binary files a/visx/quarto-1.50.0.vsix and b/visx/quarto-1.51.0.vsix differ