```ruby
if Rails.env == 'development'
  require 'rack-mini-profiler'

  # initialization is skipped so trigger it
  Rack::MiniProfilerRails.initialize!(Rails.application)
  Rack::MiniProfiler.config.position = 'right'
end
```

Hide rack profiler by default
user
```ruby
if Rails.env == 'development'
  require 'rack-mini-profiler'

  # initialization is skipped so trigger it
  Rack::MiniProfilerRails.initialize!(Rails.application)
  Rack::MiniProfiler.config.position = 'right'
  Rack::MiniProfiler.config.start_hidden = true
end
```
assistant