Based on Seppe vanden Broucke's code.

• pyPdf

This workflow is recommended:

1. Make your PDF slides however you like.
2. Run impressive-presenter.sh with your presentation file as an argument. It will create some files in the presentation directory.
3. Modify the .info file if you need to (for transitions, for example). The notes property will be shown on the presenter screen as speaker notes. HTML is allowed.
4. At the time of your presentation, open presenter.html in your laptop screen. In Chrome, you'll need to execute the browser with the --allow-file-access-from-files flag, otherwise it won't work. This flag could change without notice, so be careful and check the documentation. Or just use another browser.
5. In the main screen, start your presentation with Impressive. If everything goes well, presenter.html should update its info.