How to install GraphViz and launch GVEdit

When study Vertica query plan, it's the first time I hear about GraphViz, it turns out to be a project with history. The official site and a brief introduction is as below:
http://www.graphviz.org/

Graphviz - Graph Visualization Software

Drawing graphs since 1988

Graphviz is open source graph visualization software. Graph visualization is a way of representing structural information as diagrams of abstract graphs and networks. It has important applications in networking, bioinformatics,  software engineering, database and web design, machine learning, and in visual interfaces for other technical domains. 


Question is: if I got an GraphViz codes, how to make it displayed?

Step 1: Please download a package here

http://www.graphviz.org/Download..php

There are many versions and I downloaded Windows msi package

Step 2: launch a command window with administrator access

Please run a command

msiexec /a graphviz-x.xx.msi

And install the software as normal.

Step 3: open a command shell, go to GraphViz installation path, for example mine is:
D:\Program Files (x86)\Graphviz2.34\
Go to the bin folder, and run gvedit.exe

And you will see GVEdit launched!

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