diff --git a/notebooks/NIRSpec/ifu_optimal/ifu_optimal.ipynb b/notebooks/NIRSpec/ifu_optimal/ifu_optimal.ipynb
index d1920ca40..5086081f2 100644
--- a/notebooks/NIRSpec/ifu_optimal/ifu_optimal.ipynb
+++ b/notebooks/NIRSpec/ifu_optimal/ifu_optimal.ipynb
@@ -26,14 +26,10 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "**Use case:** optimal spectral extraction; method by [Horne (1986)](https://ui.adsabs.harvard.edu/abs/1986PASP...98..609H/abstract).\n",
-    "\n",
-    "**Data:** JWST NIRSpec IFU data; point sources.\n",
-    "\n",
-    "**Tools:**  jwst, webbpsf, matplotlib, scipy, custom functions.\n",
-    "\n",
-    "**Cross-intrument:** any spectrograph. \n",
-    "\n",
+    "**Use case:** optimal spectral extraction; method by [Horne (1986)](https://ui.adsabs.harvard.edu/abs/1986PASP...98..609H/abstract).</br>\n",
+    "**Data:** JWST NIRSpec IFU data; point sources.</br>\n",
+    "**Tools:**  jwst, webbpsf, matplotlib, scipy, custom functions.</br>\n",
+    "**Cross-intrument:** any spectrograph. </br>\n",
     "**Documentation:** This notebook is part of a STScI's larger [post-pipeline Data Analysis Tools Ecosystem](https://jwst-docs.stsci.edu/jwst-post-pipeline-data-analysis)."
    ]
   },
@@ -250,9 +246,7 @@
     "    \n",
     "print(\"\\nGood Data Region\")\n",
     "try:\n",
-    "    region2 = cubeviz_data.get_selection_definition(\n",
-    "        \"Subset 2\", format=\"astropy-regions\"\n",
-    "    )\n",
+    "    region2 = cubeviz.get_interactive_regions()['Subset 2']\n",
     "    print(region2)\n",
     "    region2_exists = True\n",
     "    data_xrange = [\n",
@@ -300,8 +294,8 @@
     "\n",
     "print(\"\\nSource\")\n",
     "try:\n",
-    "    spectrum_subset1 = cubeviz.get_data(cubeviz.data_labels[0].label,\n",
-    "                                        spatial_subset=\"Subset 1\", function=\"mean\")\n",
+    "    spectrum_subset1 = cubeviz.get_data(cubeviz.data_labels[0],\n",
+    "                                        spatial_subset=\"Subset 1\", function=\"sum\")\n",
     "    print(spectrum_subset1)\n",
     "except Exception:\n",
     "    print(\"There is no Subset 1 selected in the spectrum viewer.\")\n",
@@ -411,7 +405,7 @@
     ]
    },
    "source": [
-    "*Developer Note:*  Is there a way to retrieve the coordinates (RA, Dec) of the Subset1 region, for use in a SkyCircularAperture?"
+    "**Developer Note:**  Is there a way to retrieve the coordinates (RA, Dec) of the Subset1 region, for use in a SkyCircularAperture?"
    ]
   },
   {
@@ -578,7 +572,7 @@
     ]
    },
    "source": [
-    "*Developer Note:*  The file Webbpsf_ifucube.fits is large (946.3 MB) and takes some time to load from Box.\n",
+    "**Developer Note:**  The file Webbpsf_ifucube.fits is large (946.3 MB) and takes some time to load from Box.\n",
     "It might behoove the user to download it to a local directory and retrieve it from there."
    ]
   },
@@ -747,6 +741,15 @@
     "specviz.y_limits(0.0, clip_level / 7)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "The viewer looks like this:\n",
+    "\n",
+    "<img src=\"sdssj1652_nirspec_ifu_specviz.png\" alt=\"Specviz, an astronomy data analysis viewer, showing the emission lines in the Quasar\" width=\"600\"/>"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -785,7 +788,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.6"
+   "version": "3.11.9"
   }
  },
  "nbformat": 4,
diff --git a/notebooks/NIRSpec/ifu_optimal/requirements.txt b/notebooks/NIRSpec/ifu_optimal/requirements.txt
index fc4aff4ff..b3600be25 100644
--- a/notebooks/NIRSpec/ifu_optimal/requirements.txt
+++ b/notebooks/NIRSpec/ifu_optimal/requirements.txt
@@ -1,3 +1,3 @@
-numpy>=1.26.2
-scipy>=1.11.4
-jdaviz>=3.8.0
+numpy>=1.26.4
+scipy>=1.13.1
+jdaviz>=3.10.2
diff --git a/notebooks/NIRSpec/ifu_optimal/sdssj1652_nirspec_ifu_specviz.png b/notebooks/NIRSpec/ifu_optimal/sdssj1652_nirspec_ifu_specviz.png
new file mode 100644
index 000000000..bb1a125d4
Binary files /dev/null and b/notebooks/NIRSpec/ifu_optimal/sdssj1652_nirspec_ifu_specviz.png differ