> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bowerlabs.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Editor power-ups — equations, toggles, table of contents

> Three additions to the note editor: LaTeX/KaTeX equations, collapsible toggles, and a table-of-contents sidebar that builds itself from your headings.

**Shipped 2026-04-12 · Editor**

The note editor picks up three additions this week — small individually,
substantial together for anyone writing structured technical notes.

## LaTeX and KaTeX equations

Inline equations and block equations are now first-class in the editor.
Type `$...$` for inline math, `$$...$$` for a block, or use the slash
command. Equations render with KaTeX, the same engine arXiv uses, so what
you write is what gets typeset.

```
The Henderson-Hasselbalch equation: $pH = pK_a + \log\left(\frac{[A^-]}{[HA]}\right)$
```

## Collapsible toggles (Details)

A new `/details` slash command inserts a collapsible block — a heading
that expands and collapses on click, with arbitrary content inside. Useful
for keeping long notes scannable: collapse the methods detail, expand the
results.

## Table-of-contents sidebar

Notes with headings get an automatic table of contents in a side panel
that scrolls with the note. Click a heading to jump; the active heading
highlights as you scroll. Long protocols and reviews suddenly become
navigable.

## Try it

Open any note. The new commands are in the slash menu (`/equation`,
`/details`, or just type `/` and search). The TOC sidebar appears
automatically on notes with two or more headings.

## Related docs

* [The note editor](/capture/editor)