# Markdown task lists as PDF checkboxes

Each task item becomes a form checkbox the reader can check in the PDF viewer, not a printed square. With the switch off, the markers are printed instead.

- [ ] becomes a real form checkbox you can tick in the PDF viewer, nested or not. Toggle: tasks (off: printed markers).

- PDF: https://legivel.com/examples/text-structure/task-lists.pdf
- Page: https://legivel.com/examples/text-structure/task-lists
- Open in the editor: https://legivel.com/markdown-to-pdf?sample=task-lists
- More markdown text and structure in PDF: https://legivel.com/examples/text-structure

## Markdown source

```markdown
# Pre-departure checklist, research vessel

Tick the boxes in your PDF viewer. They are real form fields, and the ticks are saved with the file.

## Vessel

- [x] Fuel and fresh water tanks full
- [x] Life rafts inspected, certificates on board
- [ ] Engine room log signed by the chief engineer
- [ ] Navigation lights tested after dark

## Science party

- [x] Sampling plan agreed with the captain
- [ ] Hazardous materials declared
  - [x] Formalin, 20 liters
  - [ ] Liquid nitrogen, 2 dewars
  - [ ] Lithium batteries for the gliders
- [ ] Every scientist has completed the safety briefing

## Before casting off

- [ ] Weather routing received for the first 72 hours
- [ ] Port authority informed of departure time
- [ ] Head count matches the crew list

With `tasks: false` the same list prints plain markers for a document that will be signed on paper.
```