SetupConda.md

-These instructions explain how to install and use CDS conda environments under your standard user name.  The installation is for your user only.  
+These instructions explain how to install and use CDS conda environments.  The installation is for your user only.  
 
 The instructions are *not* suitable for system wide install, and in general these commands should not be run as root.
 
@@ -95,10 +95,10 @@ Enjoy!
 
 ## Updating an environment
 
-Updating an environment is almost the same
+Updating an almost identical command to update an existing environment:
 
 ```
 mamba env update --file https://apt.ligo-wa.caltech.edu/sources/conda/environments/linux-64/cds.yaml --prune
 ```
 
-```--prune``` removes packages not needed after the update.
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+```--prune``` removes packages not needed after the update.  Don't use ```--prune``` if you've added other packages you wish to keep.
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