In beginner quickstart, explain how to run individual code cells.

PiperOrigin-RevId: 497048651

Author: tensorflower-gardener

site/en/tutorials/quickstart/beginner.ipynb

@@ -85,7 +85,9 @@
         "This tutorial is a [Google Colaboratory](https://colab.research.google.com/notebooks/welcome.ipynb) notebook. Python programs are run directly in the browser—a great way to learn and use TensorFlow. To follow this tutorial, run the notebook in Google Colab by clicking the button at the top of this page.\n",
         "\n",
         "1. In Colab, connect to a Python runtime: At the top-right of the menu bar, select *CONNECT*.\n",
-        "2. Run all the notebook code cells: Select *Runtime* > *Run all*."
+        "2. To run all the code in the notebook, select **Runtime** > **Run all**. To run the code cells one at a time, hover over each cell and select the **Run cell** icon.\n",
+        "\n",
+        "![Run cell icon](images/beginner/run_cell_icon.png)"
       ]
     },
     {
@@ -382,9 +384,6 @@
   ],
   "metadata": {
     "colab": {
-      "collapsed_sections": [
-        "rX8mhOLljYeM"
-      ],
       "name": "beginner.ipynb",
       "toc_visible": true
     },