Editing-Markdown.md

-# Online (HedgeDoc)
+Check out this short [Markdown Guide](https://guides.github.com/features/mastering-markdown/).
 
-# Locally (VS Codium)
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+# Online: HedgeDoc @ TUHH
+
+Just LogIn at https://writemd.rz.tuhh.de/ and create a new note. Paste all of the above into a document and work on it.
+
+![image](uploads/e40de747449e895ab5e33c80330649f6/image.png)
+
+# Online: HedgeDoc @ HedgeDoc
+
+Same as **HedgeDoc @ TUHH**. Just visit https://demo.hedgedoc.org/ .
+
+# Offline: VSCodium (MIT license)
+
+Download [VSCodium](https://vscodium.com/)  and install the [Mathpix Markdown](https://github.com/mathpix/vscode-mathpix-markdown.git) extension. 
+
+Render your document with `<CTRL>+<SHIFT>+V`
+
+![image](uploads/2a93626ad49ea89143fd4563f9c6a057/image.png)
+
+# Offline: VSCode (by Microsoft)
+
+Download [VSCode](https://code.visualstudio.com/) and install the [Markdown+Math](https://github.com/goessner/mdmath) extension. Exactly the same as VSCodium but with Microsoft's branding. See [here](https://dev.to/0xdonut/why-and-how-you-should-to-migrate-from-visual-studio-code-to-vscodium-j7d).
+
+As for VSCodium, render your document with `<CTRL>+<SHIFT>+V`
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