Kyle Scheuerlein

Automatically turn all posts into excerpts of 300 characters and add a “Show More” link that will load directly in the page. If your post includes a picture, it will also obtain a thumbnail and place that at the beginning of the excerpt. Supports Infinite Scroll, too (assuming you manually enabled it on your P2 site)!
<ul>
<li>Shorter posts will be left alone, unless they have a picture</li>
<li>Posts with a picture will always be turned into a thumbnail/excerpt</li>
<li>Expanding or contracting a post will scroll to the top of the post</li>
</ul>
Planned:
<ul>
<li>Long posts with embedded video and no image include the video in the excerpt</li>
<li>Change the character length from the admin screen</li>
</ul>

Show More for P2

Works smoothly even on latest WordPress & Mercury child theme of P2.

Plug and play

Automatically turn all posts into excerpts of 300 characters and add a "Show More" link that will load directly in the page.

Add support to the P2 theme for Jetpack Infinite Scroll. This will also automatically hide the default “Older posts” link in place of the infinite scroll button (for visitors that have JavaScript enabled).

Infinite Scroll for P2

Add support to the P2 theme for Jetpack Infinite Scroll.

Show More for P2 vs Infinite Scroll for P2