Hi Fergumungus. Welcome to the Hueman forum. This is pretty straight-forward. Only requires modifications to one theme file in a child theme. If you don’t yet have a child theme:
1. In Theme Options click the Help tab in the upper righthand corner.
2. One of the options in the list is to download a sample child theme. This downloads the theme zip file to your local computer.
3. Install the new theme in your Admin panel by selecting Add New > Upload Theme > Choose File, then select the zip file you downloaded.
4. Activate the child theme.
You’ll now have a pre-configured child theme with a style.css file and functions.php file to which you can add customizations.
To create the archive page:
1. Copy archive.php from the parent theme to your child theme.
2. Make the following changes to the child theme archive.php file (full page code here: https://pastebin.com/7FyHHrRG)
– Add the page template name section at the top.
– Add the section to set up a custom archive query.
– Modify two post loop lines to use the custom query.
– Add the line at the bottom to reset the query.
3. Create a new page; select the All-Posts Archive Page template.
4. Add the page to your menu.
Let me know if you have any questions.