How to edit spaces in Obsidian inline math
As of October 2026, Obsidian accepts inline math between dollar signs.
How to reuse TeX macros across Obsidian notes
As of October 2026, Obsidian supports inline and display math through MathJax. Shared TeX Preamble loads supported definitions from a vault file into that engine.
Background
Keep notation in one file when several notes use the same commands. Reload that file after editing a definition.
2 ways to do it
Write the expression directly
For a short formula, write its full LaTeX expression between dollar signs. Use display math for a separate equation block.
- limits
- Writing expressions directly avoids a shared macro file, but you still maintain the formula text in each note.
- source
- Obsidian math syntax
Shared TeX Preamble from this site
Select a macro file in your vault to load its definitions into the math engine. Your notes use those commands without copies of the definitions.
- limits
- Removed definitions remain available until Obsidian restarts.
Open larger MIT · no telemetry · core features free
Reuse TeX macros from one vault file
Create Macros.md with your definitions in a display math block.
Select that note in the Macro file setting.
Use a defined command in math in another note.
After editing the file, run Reload the macro file.
Common questions
Why does another person see an undefined command?
Your note contains the macro call rather than its definition. Share the macro file as well as the note.
Can I inspect a library before switching?
Pro provides a library preview with sample calls and errors. Previewing doesn't activate that library.
Sources
- Obsidian math syntaxobsidian.md
That's every step, start to finish.
You're officially a regular.
Obsidian rewards people who share. NoteMods is just me and a lot of coffee. If this guide saved you a fight with the syntax, buy me a cup.
That's visit . Regulars are the reason I keep NoteMods running. If it's part of your routine now, a coffee says thanks better than anything.
The plugin in this guide
Shared TeX Preamble
Define your math commands once, then use them in your notes.