Anyone publishing a gallery in a post in Publii might not want to display the featured image because it is already included in the gallery.

Here's a trick from the Publii forum to solve this:

In the config.json file, add post__image--none under the postConfig section in options, as shown in bold in the snippet:

"postConfig": [
{
"name": "featuredImageWidth",
"label": "Featured Image width",
"value": "post__image--wide",
"type": "select", "options":

[
{ "label": "None", "value": "post__image--none" }, 
{"label": "Normal", "value": "post__image--normal" }, 
{ "label": "Wide", "value": "post__image--wide" },
{ "label": "Full", "value": "post__image--full" }

]
}, ...

Additionally, add an entry to main.css (or in Publii under Tools & Plugins in Custom CSS):

.post__image--none {display: none;}

After this, a new option 'None' will appear for the featured image in posts.

See also:

As of April 15, 2023