To launch the presentation:

1. Open the .html file in Chrome.
2. If necessary, unblock pop-ups from the .html file.
3. Refresh Chrome to get it to open the presenters window.
4. Move the presenters window to a second screen.
5. Ensure that focus is on the presenters window.
6. Press p to enter presenter mode.

You are ready to present.

Advance the slides using arrow keys or PgUp/PgDn.

Clicking on slides in the presenters window will not advance the slides in the main window.

More information on managing the presentation at the following URLs:

https://rmarkdown.rstudio.com/ioslides_presentation_format.html#display_modes

https://rmarkdown.rstudio.com/ioslides_presentation_format.html#presenter_mode

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Here is the post that describes the issue with state not being saved between Python chunks.

https://support.rstudio.com/hc/en-us/community/posts/222207188-Multiple-Python-chunks-in-RStudio-R-Markdown

And this post on Stack Overflow:

Using python together with knitr http://stackoverflow.com/questions/40171949/using-python-together-with-knitr

which links to the following

knitr - Python engine cache option not working http://stackoverflow.com/questions/30175948/knitr-python-engine-cache-option-not-working

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