The edit mode is activated by pressing an 'edit' button on a show view. This shows additional editing tools and switches on the best_in_place form fields. When editing is finished, use 'save' or 'cancel' buttons to quit the edit mode and return to a normal show view. Several editing groups per page are supported. Thus, you can have several 'boxes' to edit on a page.
Gemfile gem 'edit_mode', '~> 0.0.3'
install gem install edit_mode -v 0.0.3