The easiest and more simple way to do this is to use the Readmore button at the end of the post content.
You can also edit the index.hbs file (Documents ▸ Publii ▸ sites ▸ YOUR_SITE ▸ input ▸ themes ▸ YOUR_THEME) and change the following part of code:
{{#if hasCustomExcerpt}}
{{{ excerpt }}}
{{else}}
<p>{{{ excerpt }}}</p>
{{/if}}
to:
{{#if hasCustomExcerpt}}
{{{ excerpt }}}
{{else}}
{{{ text }}}
{{/if}}
That’s it.
To preserve your custom code and prevent it being overwritten the next time the theme is updated, please ensure that you have created override files; these are, essentially, copies of the existing theme files that are stored separately from the main theme files → https://getpublii.com/dev/theme-overrides/
