RE: The issue is that I cannot see the Customize button for the Slim Plus Template.
Slim Plus has not yet been upgraded to use the Customizer so there is no button. Instead it is customized by using shortcode options.
Here’s the doc page with the Slim Plus shortcode options.
Navigate to the page which has the directory onit. Edit the page. Switch the page editor to the Text tab.
- What is the exact shortcode being used to embed the directory on the page?
- Can you share a link to the directory page?