Comments on pages or blog posts are displayed in one of two views:
Threaded: Shows the comments in a hierarchy of responses. Each reply to a comment is indented to indicate the relationships between the comments.
Flat: Displays all the comments in one single list and does not indicate the relationships between comments.
By default, comments are displayed in threaded mode. A Confluence Administrator (see Global Permissions Overview) can enable or disable the threaded view for the entire Confluence site.
To enable or disable the threaded view:
Choose the cog icon , then choose General Configuration
Select Further Configuration in the left-hand panel
Choose Edit
Select or unselect the Threaded Comments checkbox to enable or disable threaded mode