Redmine/app/views/issues/_form.rhtml

<div id="issue_descr_fields" <%= 'style="display:none"' unless @issue.new_record? || @issue.errors.any? %>>
<p><%= f.select :tracker_id, @project.trackers.collect {|t| [t.name, t.id]}, :required => true %></p>
<%= observe_field :issue_tracker_id, :url => { :action => :update_form, :project_id => @project, :id => @issue },
                                     :update => :attributes,
                                     :with => "Form.serialize('issue-form')" %>

<p><%= f.text_field :subject, :size => 80, :required => true %></p>
<p><%= f.text_area :description,
                   :cols => 60,
                   :rows => (@issue.description.blank? ? 10 : [[10, @issue.description.length / 50].max, 100].min),
                   :accesskey => accesskey(:edit),
                   :class => 'wiki-edit' %></p>
</div>

<div id="attributes" class="attributes">
	<%= render :partial => 'attributes' %>
</div>

<% if @issue.new_record? %>
<p><label><%=l(:label_attachment_plural)%></label><%= render :partial => 'attachments/form' %></p>
<% end %>

<% if @issue.new_record? && User.current.allowed_to?(:add_issue_watchers, @project) -%>
<p><label><%= l(:label_issue_watchers) %></label>
<% @issue.project.users.sort.each do |user| -%>
<label class="floating"><%= check_box_tag 'issue[watcher_user_ids][]', user.id, @issue.watched_by?(user) %> <%=h user %></label>
<% end -%>
</p>
<% end %>

<%= call_hook(:view_issues_form_details_bottom, { :issue => @issue, :form => f }) %>

<%= wikitoolbar_for 'issue_description' %>