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Fist, Welcome to XOOPS!
If you're referring to displaying comments in flat, nested, or threaded view formats by default, this is handled in Preferences Main »» General Settings »» Default Comment Display Mode.
If you want the comments on your site to look like the ones on this site, select "Flat".
Hope this helps.
James
Insanity can be defined as "doing the same thing over and over and expecting different results."
Stupidity is not a crime. Therefore, you are free to go.