Question "Content in first post" setting not functioning?

I am trying to get the first post setting to show something less than the complete article which is very long (the whole article is on the page itself). Unfortunately, all the settings ... including the "link" setting shows the complete article as the first post in the topic.

Is there a way to show a link only or show a very brief portion of the original article in the forum?

Thank you for your help.

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