Update org.omg.sysml.site README to clarify instructions for PlantUML.

Author: seidewitz

org.omg.sysml.site/README.md

@@ -12,21 +12,26 @@
 
 4. Navigate to the `org.omg.sysml.site.zip` archive and select it. (You can give it a name if you wish.) Click `Add`.
 
-5. In the Install window, select the `KerML and SysML Editors` category and click `Next`.
+5. In the Install window, expand the `KerML and SysML Editors` category.
 
-6. Continue with the installation (select `Install Anyway` if asked), and, when it is complete, restart Eclipse.
+6. Select `SysML v2 Feature` and click `Next`.
+   * If you also wish to install the `SysML v2 PlantUML Feature`, please first follow the instructions below under <br/> "Installing PlantUML graphical visualization".
+
+7. Continue with the installation (select `Install Anyway` if asked), and, when it is complete, restart Eclipse.
 
 ## Installing PlantUML graphical visualization
 
 Graphical visualization is available in Eclipse using the open source [PlantUML](https://plantuml.com) tooling to render diagrams.
 
-0. Make sure that your Eclipse has PlantUML with SysMLv2 extensions. You can install it from the update site of [ https://github.com/himi/p2-update-puml-sysmlv2/raw/main/updates](https://github.com/himi/p2-update-puml-sysmlv2/raw/main/updates) with Help > Install New Software
+0. Make sure that your Eclipse has PlantUML with SysMLv2 extensions. You can install it from the update site of<br/> 
+[ https://github.com/himi/p2-update-puml-sysmlv2/raw/main/updates](https://github.com/himi/p2-update-puml-sysmlv2/raw/main/updates) with Help > Install New Software
 
-1. PlantUML visualization requires that [GraphViz](https://www.graphviz.org) be installed. Visit [ https://www.graphviz.org/download/](https://www.graphviz.org/download/) 
-and download the appropriate package for your environment.
-   * The recommended GraphViz version is 2.44.1.  Make sure you have initialized GraphViz with `dot -c` command.  See [ https://plantuml.com/ja/graphviz-dot](https://plantuml.com/ja/graphviz-dot) for details.
+1. PlantUML visualization requires that [GraphViz](https://www.graphviz.org) be installed.Visit [ https://www.graphviz.org/download/](https://www.graphviz.org/download/) and <br/>
+download the appropriate package for your environment.
+   * The recommended GraphViz version is 2.44.1.  Make sure you have initialized GraphViz with `dot -c` command. <br/>
+   See [ https://plantuml.com/ja/graphviz-dot](https://plantuml.com/ja/graphviz-dot) for details.
 
-2. If Eclipse cannot automatically find the path to the GraphViz executable, you can set it by going to `Preferences > PlantUML`. 
+2. If Eclipse cannot automatically find the path to the GraphViz executable, you can set it by going to `Preferences > PlantUML`. <br/>
 For details, visit [ https://plantuml.com/en/eclipse](https://plantuml.com/en/eclipse).
 
 ## Installing the model library and modeling projects
@@ -64,9 +69,6 @@ and make sure that `sysml.library` is before `kerml` and `sysml` in the build or
 4. To show SysML diagrams, in `Window > Show View > Other...` select the PlantUML view. The diagram rendered in the view is relative to the text selected 
 in the active SysML editor view. Tree (BDD-like), interconnection (IBD-like) and state machine views are currently supported.
 
-**Release Note:** While performance has improved further in this release, there are still cases in which the processing of a file with 
-several name resolution errors can take a long time, particularly if the `Quantities and Units` library is being used.
-
 ## Initializing new model projects
 
 You can also create a separate project for your KerML or SysML files.