Is there a way to decrease the space between the list header and the list values?

Is there a way to decrease the space between the list header and the list values?

Try searching the forum for heading margin.

This works, but I had to disable the Outliner plugin because with it activated, the CSS snippet didn’t work. I don’t know why

ul {
    margin-block-start: -1em !important;
}

ul ul {
    margin-block-start: inherit !important;
}

You need to apply spacing changes to ‘after’ headings.
Try: