Viewing the Presentation

I've created the presentation using obsidian-advanced-slides specific features.
You can also view it using marp.
Note that for marp, the notes need to be wrapped in HTML comments.
Additionally, some obsidian-advanced-slides specific features won't work in Marp.

VS-Code

Install the marp-team.marp-vscode extension.
Disable shd101wyy.markdown-preview-enhanced or similar extensions if you have it installed, because it blocks marps slide preview.
There is also a reveal.js to .md slides extension: "evilz.vscode-reveal" but i prefer marp in vs-code because it is much simpler and i use vscode to code and not to write notes.

MARP

Creating Slides

Just add this to the metadata of your markdown file (markdown.marp.toggleMarpFeature):

--- 
marp: true
--- 

Exporting to PDF, HTML, PPTX, PNG or JPEG

1. CTRL + SHIFT + P
2. markdown.marp.export
3. ENTER

Obsidian

I prefer writing markdown presentations in obsidian, because I have all my notes in obsidian already.

You can use marp-slides (obsidian://show-plugin?id=marp-slides).
Or a reveal.js to .md slides plugin like obsidian-advanced-slides (obsidian://show-plugin?id=obsidian-advanced-slides).

Obsidian Advanced Slides

Show Preview: CTRL + SHIFT + E.