# Theme
You can set options when you add the themes into your app. Otherwise, just put the symbol of the theme filename.
### For Rack App
```ruby
use Rack::DevMark::Middleware, [:title, Rack::DevMark::Theme::GithubForkRibbon.new(position: 'right')]
```
### For Rails App
In config/application.rb
```ruby
module MyApp
class Application < Rails::Application
config.rack_dev_mark.theme = [:title, Rack::DevMark::Theme::GithubForkRibbon.new(position: 'right')]
end
end
```
## tag
Insert the environment string into tags or attributes.
e.g.
`
foo
` can be `foo
`
### options
`type`: `prefix` (default) or `postfix`
`upcase`: `true` or `false` (default)
`name`: the name of tag to insert env
`attribute`: the name of attribute to insert env
## title
Just add the environment string into the page title.
e.g.
`My Homepage` on development env will be `(development) My Homepage`
options are the same as tag theme.
### options
`type`: `prefix` (default) or `postfix`
`upcase`: `true` or `false` (default)
## github_fork_ribbon
["Fork Me on GitHub" like ribbon](https://github.com/simonwhitaker/github-fork-ribbon-css) originally created by [simonwhitaker](https://github.com/simonwhitaker)

### options
`position`: left (default), right, left-bottom, right-bottom
`color`: red (default), orange, green, black
`fixed`: `true` or `false`(default)