This plugin adds a help icon to the composer window giving you the ability to show a help document to the user.
You can access its settings from the Admin > Plugins page
There is also an Admin Setting to identify which topic to use for the content of the modal window.
Clicking on the button in the composer window will produce the following modal window to the user
Follow the directions at Install a Plugin using https://github.com/cpradio/discourse-plugin-composer-help-button.git as the repository URL.
Matthew Wilkin
GNU GPL v2