Add PX7 Markdown Viewer tool page

_tools/px7-markdown-viewer.md

@@ -0,0 +1,76 @@
+---
+title: PX7 Markdown Viewer
+category: documents
+description: "PX7 Markdown Viewer opens, previews, and edits local Markdown files on macOS."
+icon: px7-markdown-viewer.png
+website: https://markdown.px7.digital/markdown-viewer/
+syntax:
+  - id: headings
+    available: y
+  - id: paragraphs
+    available: y
+  - id: line-breaks
+    available: y
+  - id: bold
+    available: y
+  - id: italic
+    available: y
+  - id: blockquotes
+    available: y
+  - id: ordered-lists
+    available: y
+  - id: unordered-lists
+    available: y
+  - id: code
+    available: y
+  - id: horizontal-rules
+    available: y
+  - id: links
+    available: y
+  - id: images
+    available: y
+    notes: "Relative images are loaded from the Markdown file's folder."
+  - id: tables
+    available: y
+  - id: fenced-code-blocks
+    available: y
+  - id: syntax-highlighting
+    available: y
+    notes: "Available for fenced code blocks with a supported language name."
+  - id: footnotes
+    available: n
+  - id: heading-ids
+    available: n
+  - id: definition-lists
+    available: n
+  - id: strikethrough
+    available: y
+  - id: task-lists
+    available: y
+  - id: emoji-cp
+    available: y
+  - id: emoji-sc
+    available: n
+  - id: highlight
+    available: n
+  - id: subscript
+    available: n
+  - id: superscript
+    available: n
+  - id: auto-url-linking
+    available: y
+  - id: disabling-auto-url
+    available: n
+  - id: html
+    available: n
+    notes: "Raw HTML is intentionally not rendered."
+see-also:
+  - name: PX7 Markdown Viewer distribution repository
+    link: https://github.com/px7digital/px7-markdown-viewer
+---
+
+[PX7 Markdown Viewer](https://markdown.px7.digital/markdown-viewer/) is a free proprietary macOS application for opening, previewing, and editing local Markdown files. It displays rendered Markdown in the app and adds rendered previews to Finder Quick Look. The application works with files in place and does not require an account or cloud service.
+
+The renderer supports CommonMark and several GitHub Flavored Markdown elements, including tables, task lists, strikethrough, and fenced code blocks with syntax highlighting. Raw HTML is deliberately disabled. Press **Command-E** to edit the plain-text source and **Command-S** to save changes back to the same file.
+
+{% include tool-syntax-table.html %}