Question about the Inc. blog template

It appears as though the designer of this template is no longer accessible, as the link to his email goes nowhere and his site (a Squarespace site, btw) is offline.

My question is, is it possible to add more than one image to a blog post. It seems as though it is either one image, or none. Thanks!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

of course you can add 10000 of images in blog

How? Do you edit the template or does the blog app allow this inline?

you can use multireference field in blog post or you can add these image in rich text field