The “slug” is the URL-friendly version of the name. It is usually all lowercase and contains only letters, numbers, and hyphens.
If there are a lot of rows within a Repeater or Flexible Content field, you need to scroll a lot to get to the field you want to edit and it is not easy to find the right one. Also, it is difficult to change the order of the rows.
The ACF Repeater & Flexible Content Collapser plugin solves this problem and add a button to collapse or expand all rows at once.
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