You can easily display total posts count below the KB items. Just add ‘count_info=1’ parameter in shortcode and you’ll see ‘Show All’ text below the KB items.
Example:
Following shortcode will display 4 categories and each category display 3 items and bottom of each category it will display ‘Show All X Posts’ message.
[bkb_category categories="introduction,copyright,fixing-issues,feature-questions" limit="3" orderby="id" order="ASC" posts_count="1" cols="2" count_info=1/]
Output:
Hope that will help you. Thanks !