> ## 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.

# Image annotations + diagrams

> A built-in drawing editor (powered by Excalidraw) lets you annotate any image and build diagrams from scratch.

**Shipped 2026-04-12 · Capture**

Lab work is visual. A gel image, a microscopy slide, a system diagram — these
deserve more than a caption. Bower now ships a full drawing editor inline.

## Annotate any image

Click any image in a note (or open an image attachment), tap the **draw icon**,
and the full-screen annotation editor opens with your image as the background.

* Circle the band you care about.
* Add labels with arrows.
* Highlight regions of interest.
* Sketch over a microscopy image to call out what's anomalous.

Annotations are stored as a separate layer, so the original image is never
modified — and you can re-open the editor any time to refine your drawings.

## Diagrams from scratch

Type `/diagram` in the note editor (or click the diagram icon in the
toolbar) to open the same editor with a blank canvas. Useful for:

* Workflow / decision diagrams
* Apparatus sketches
* Reaction schemes
* Quick whiteboard-style explainers

The diagram saves as an inline image in your note, and you can re-open it
to edit later — your shapes, arrows, and text are all preserved.

## What you get

The editor is powered by [Excalidraw](https://excalidraw.com/), so you get the
full set of tools: rectangle, ellipse, diamond, arrow, line, freehand draw,
text, image, eraser. Keyboard shortcuts (V, R, A, T, etc.) make it fast once
you're used to it.

## Try it

* **Annotate**: click any inline image → draw icon, or open an image
  attachment → **Annotate**.
* **Diagram**: in the note editor, type `/diagram` or click the diagram icon
  in the toolbar.

## Related docs

* [Image annotations & diagrams](/capture/annotations-and-diagrams)
* [The note editor](/capture/editor)