add anaconda navigator instructions in 'Running and Quitting' episode

_episodes/01-run-quit.md

@@ -58,7 +58,10 @@ does not require an internet connection.
 
 ## Starting JupyterLab
 
-### Mac OS X
+You can start the JupyterLab server through the command line or through an application called 
+`Anaconda Navigator`. Anaconda Navigator is included as part of the Anaconda Python distribution.
+
+### macOS - Command Line
 To start the JupyterLab server you will need to access the command line through the Terminal. 
 There are two ways to open Terminal on Mac.
 
@@ -73,8 +76,8 @@ $ jupyter lab
 ~~~
 {: .bash}
 
-### Windows Users
-To start the JupyterLab server you will need to access the open Anaconda Prompt.
+### Windows Users - Command Line
+To start the JupyterLab server you will need to access the Anaconda Prompt.
 
 Press <kbd>Windows Logo Key</kbd> and search for `Anaconda Prompt`, click the result or press enter.
 
@@ -85,8 +88,22 @@ $ jupyter lab
 ~~~
 {: .bash}
 
-Below is a screenshot of a similar JupyterLab landing page to the one that should open in your 
-default web browser after starting the JupyterLab server on either Mac OS X or Windows.
+###  Anaconda Navigator
+
+To start a JupyterLab server from Anaconda Navigator you must first [start Anaconda Navigator (click for detailed instructions on macOS, Windows, and Linux)](https://docs.anaconda.com/anaconda/navigator/getting-started/#starting-navigator). You can search for Anaconda Navigator via Spotlight on macOS (<kbd>Command</kbd> + <kbd>spacebar</kbd>), the Windows search function (<kbd>Windows Logo Key</kbd>) or opening a terminal shell and executing the `anaconda-navigator` executable from the command line.
+
+After you have launched Anaconda Navigator, click the `Launch` button under JupyterLab. You may need
+to scroll down to find it.
+
+Here is a screenshot of an Anaconda Navigator page similar to the one that should open on either macOS
+or Windows.
+
+<p align='center'>
+  <img alt="Anaconda Navigator landing page" src="../fig/0_anaconda_navigator_landing_page.png" width="750"/>
+</p>
+
+And here is a screenshot of a JupyterLab landing page that should be similar to the one that opens in your 
+default web browser after starting the JupyterLab server on either macOS or Windows.
 
 <p align='center'>
   <img alt="JupyterLab landing page" src="../fig/0_jupyterlab_landing_page.png" width="750"/>