> For the complete documentation index, see [llms.txt](https://themedocs.zenit.design/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://themedocs.zenit.design/en/update-guides/theme-3.5.3.md).
# Theme 3.5.3
In this update there are so-called breaking changes in two configurations. Please check these two fields briefly after the update.
### Gallery product detail page
The display of the gallery on the product detail page is affected by the breaking changes. The display of the product image may have changed here.
### 1. Checkbox Background
In this update, the **background (1)** checkbox has been removed. Instead, a color must be defined in the Background (3) colorpicker field, or if no color is desired, replace it with the value `transparent`.
### 2. Colorpicker background
The **Background (2)** colorpicker field has been given a new default value because referencing the previously defined variable `$zen-product-listing-card-img-bg` from *Tab: General > Section: Product Images* can lead to a compile error.
According to Shopware, it is not certain that previously defined variables will already exist at a later point. The order of the variables when compiling may differ from the order of defining the variables in the theme configuration.
### 3. Background-color overlay
You can use the new checkbox **Background-color overlay (4)** to control whether the background color should be overlaid on the gallery image. This setting was previously taken from the field of the same name under *Tab: General > Section: Product images*.\
\
Description of this functionality:
{% content-ref url="/pages/-MHX7-AyREKKxS1QTb\_r" %}
[Product image background](/en/content/product-images/product-image-background.md)
{% endcontent-ref %}
