> For the complete documentation index, see [llms.txt](https://docs.wpblockslider.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wpblockslider.com/controller-blocks/thumbnails-controller-block.md).
# Thumbnails Controller Block
Thumbnail controller block allows you to create beautiful looking thumbnail pagination for your block slider.
This guide covers all about the thumbnail controller block and how you can use it to create a stunning thumbnail pagination.
{% hint style="warning" %}
Thumbnail pagination is currently unsupported with the block slider query mode.
{% endhint %}
### Initial Thumbnail Pagination
After inserting the thumbnail pagination. You will be presented with some placeholder thumbnails (that is automatically populated based on the slide count of your slider).
initial thumbnail pagination
### Uploading Thumbnails
You can now insert your desired thumbnail images by clicking on each of the thumbnail items.
