Open these in Fast Markdown Reader. Each one exists to show a claim the app makes, and most of them are the exact cases that make other readers stumble.
| Document | What to look at |
|---|---|
code-blocks.md |
34 languages highlighted natively. Every snippet hides a URL or a # inside a string — the case that makes naive highlighters grey out the rest of the line. Nothing here should be grey except real comments. |
math.md |
Formulas between $$, drawn by the app itself with no internet. Zoom in: they stay sharp, because they're vector art, not pictures. |
images.md |
Twelve public-domain photographs of differing heights. Scroll hard, both ways — the scroll bar shouldn't twitch and your place shouldn't jump. |
moby-dick.md |
The whole novel — 213,000 words in one file, public domain. It should open instantly, the scroll bar should be right from the first frame, and the contents list jumps. |
Mac App Store builds are sandboxed, which means macOS hands the app the single file you opened and nothing else — a document's own pictures are a different file, so they're blocked, and macOS never asks. Click the "Click to allow images in this folder" placeholder (or File → Allow Images in This Folder…) and pick the folder once. It's remembered from then on.
The direct download isn't sandboxed and reads them straight away.