app/views/spree/admin/sale_images/_form.html.erb
<div data-hook="admin_image_form_fields">
<div class="four columns alpha">
<div data-hook="file" class="field">
<%= f.label :attachment, Spree.t(:filename) %><br>
<%= f.file_field :attachment %>
</div>
</div>
<div data-hook="alt_text" class="field omega five columns">
<%= f.label Spree.t(:alt_text) %><br>
<%= f.text_area :alt, :rows => 4, :class => 'fullwidth' %>
</div>
</div>
<div class="clear"></div>
<br/>
<%= render 'spree/admin/shared/sale_images' %>