Hi

1. Create single portfolio item by: Portfolio > Add new, refer: https://seatheme.net/documentation/art/index.html#portfolio
(1.1) set “Featured Image”, it should be thumbnail shown in portfolio list
(1.2) set “category“, each project should be assigned one category at least.

2. Create new page(Page> add new), insert Grid by BM Content Builder
refer: https://seatheme.net/documentation/art/index.html#bm-builder
(2.1) Set template, choose the category mentioned on (1.2).
(2.2) Filter(the submenu what you talked): If you want to show filter, please enable the “Filter” option. Make sure there are sub-categories in the category mentioned on (1.3). The sub-categories will be shown as filter items. The category structure looks like:

3. set this page(created on 2) as frontpage, refer: https://seatheme.net/documentation/art/index.html#frontpage

Regards!
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