I need change imagine_filter('sylius_small') to imagine_filter('sylius_admin_product_original')
file path => Sylius\vendor\sylius\sylius\src\Sylius\Bundle\UiBundle\Resources\views\Form\imagesTheme.html.twig
{% block sylius_taxon_image_widget %}
{% apply spaceless %}
{{ form_row(form.type) }}
{% if form.vars.value.path|default(null) is null %}
<label for="{{ form.file.vars.id }}" class="ui icon labeled button"><i class="cloud upload icon"></i> {{ 'sylius.ui.choose_file'|trans }}</label>
{% else %}
<img class="ui small bordered image" src="{{ form.vars.value.path|imagine_filter('sylius_small') }}" alt="{{ form.vars.value.type }}" />
<label for="{{ form.file.vars.id }}" class="ui icon labeled button"><i class="cloud upload icon"></i> {{ 'sylius.ui.change_file'|trans }}</label>
{% endif %}
<div class="ui hidden element">
{{ form_widget(form.file) }}
</div>
<div class="ui element">
{{- form_errors(form.file) -}}
</div>
{% endapply %}
{% endblock %}
Copy the file to templates/bundles/SyliusUiBundle/Form/imagesTheme.html.twig
https://docs.sylius.com/en/latest/customization/template.html
https://symfony.com/doc/current/bundles/override.html#templates