With this custom field on the property group you can display the options of the group as "Product symbols" on the product page. Only options with an image are displayed – you can assign the image directly to the respective option. The group will still appear in the properties table as usual.
Tip: Upload the symbols as SVG or PNG in your desired colour – they are not recoloured.
Note: You can enable/disable the "Product symbols" in the theme configuration.
You can find the "Show as product symbol" custom field in the respective property group:
"Catalogues" ⇒ "Properties" ⇒ choose the property group ⇒ Block "Custom fields"
Type: Select ("no" / "yes")
Technical name: twt_{theme}_{edition}_custom_field__property_group__product_symbols