# Topic List Previews (TLP)

**URL:** https://meta.discourse.org/t/topic-list-previews-tlp/209973
**Category:** Theme component
**Created:** [November 23, 2021, 12:25pm UTC](https://meta.discourse.org/t/topic-list-previews-tlp/209973 "2021-11-23T12:25:59Z")
**Posts on this page:** 1
**Showing post:** 711

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### Author: ![Moin](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/moin/32/554653_2.png) [@Moin](https://meta.discourse.org/u/Moin)
#### Post date: [January 3, 2026, 1:43pm UTC](https://meta.discourse.org/t/topic-list-previews-tlp/209973/711 "2026-01-03T13:43:03Z")

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> [@stephtara](#):
>
> How do I trigger topic regeneration?

So it works for new topics?  
I think you need to rebake the old posts:

> [@How to change the length of existing excerpts?](https://meta.discourse.org/t/how-to-change-the-length-of-existing-excerpts/278722/2):
>
> Yup - you just need to rebake the posts: $ cd /var/discourse $ ./launcher enter app $ rake posts:rebake

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