How to truncate and add read more button on rich text across the entire website?

Store Design
, ,
1

www.okhli.com.au

P: Narre_3805

Hi all,

hoping someone can please help me with adding a “read more (+/-)” to truncate long paragraphs after 4 lines? I’d like this to be applied across the entire website.

I’m using the Stiletto theme.

Thanks!