Wrote HTML in my markdown and it disappeared entirely
What you are seeing
You wrote HTML in your markdown, and it has vanished from both the preview and the page.
#Why it happens
Markdown never renders raw HTML. The editor preview and the viewer both strip it, and anything outside the safe set of GitHub-style elements and attributes is dropped without a warning.
#What to do
Use markdown syntax instead. If you were using HTML for layout, use a diagram fence, or lay the content out on the surrounding Confluence page.
#Settings involved
Setting | Where | What it does |
|---|---|---|
Global settings → Capabilities → Markdown | Site | Hiding Markdown removes it from the Capable nav bar and the content byline menu across the site. It does not stop existing macros from rendering. |
Space settings → Space Capability Settings | Space | Auto shows the byline entry only when the page already carries markdown. Always shows it on every page in that space. Never hides it there. |
Global settings → Features → AI integrations | Site | "Allow AI-powered features across Capable. Turn off to disable AI for all users." Turning it off removes the Studio (Generate markdown with AI) section from the markdown catalogue. |
#Limits that apply here
Limit | Value | What happens |
|---|---|---|
Large-document scroll mode | 500,000 characters | Past this, the document shows "⚠️ Large content detected. Rendering in scrollable mode." and sits in a scrolling box 1,200 pixels high instead of showing inline. |
Very large documents | Over 500,000 characters | Only the part you are looking at is drawn at any one time, which keeps long documents responsive. |
Rovo and MCP document size | 512 KB (524,288 characters) | Creating or updating a markdown asset through the Capable tools refuses anything larger, rather than cutting it short, and asks you to split it. |
#Related
LaTeX maths ($…$ or $$…$$) renders as literal dollar signs
There is no math or LaTeX plugin in the markdown pipeline.
Mermaid diagram works in mermaid.js elsewhere but fails or looks different here
Diagrams are rendered server-side by Kroki, not by the browser mermaid library, so syntax
Everything else
The rest of this family.
Found it? Good.
