The HTML tag 'details' misses its indicator when viewing the article


A knowledge article is edited using the source button and extra HTML code is inserted:


This generates a panel which can be opened/closed using an indicator. Depending on the browser/OS this indicator is not visible.


Different CSS in the page affects the marker and hides it.


You can add some CSS to force the indicator to appear. Add this to the start of the page (again via the source option in the rich-text editor):

details > summary {
display: list-item;