First you need to download and install Wrangler: details of this are on the home page. All the details of getting Wrangler running are further down this page.
The system is documented: this tells you about all the refactorings and other facilities. You can read it here. Installation instructions are further down this page.
You can see some introductory presentations about using Wrangler here.
Finally, you can take a look at the videos about Wrangler, available from the home page.
Follow the guide of the Wrangler Language Server
Follow the INSTALL file from the repository.
(currently outdated)
Load a .erl file.
Start/stop using
Ctrl-C, Ctrl-R
To undo any refactoring type
Ctrl-C, Ctrl-_
To configure the search directories, select the Customize Wrangler menu option.
On Windows, Erlang release R14/above are required
On Windows systems, use a path with no spaces in it.
Install Eclipse, if you didn’t already.
All the details here.