Writing
A Post with Its Own Images
This post is a page bundle: a folder with an index.md and its images side by
side. The image below is referenced by its file name alone, so the post can be
moved or renamed without breaking it.

The image is only 300 pixels wide. It stays at its natural size instead of being stretched to fill the column.
A Post with a Manual Summary
Only this first paragraph appears in the post list. Everything after the summary divider shows up only on the post’s own page.