Blog Page Setting

Hello @genehu,

Thank you for reaching out to us!
For that you will need to add a Read More tag.

To do this please go to Posts > edit a post > and there add the ‘read more’ tag after your first paragraph or wherever you want by clicking this button (see screenshot): https://gyazo.com/9b7eb7828f613d7131f4964614768692
Or if you are using Gutenberg you can use the More block: https://gyazo.com/8ec5a36c63dc0c5e1e3f6b43b9481213

All the best,
Mihaela