I was working on a slideshow about Using Gestures in Angular 2 Components for a lightning talk at the December Northwest Chicago JavaScript meetup and I found the code sections just weren't large enough. So I threw together a little JavaScript to add "+" and "-" buttons next to each code section that maximizes/restores the code blocks for easier viewing during the presentation:

Screenshot of slide showing plus sign to right of code section

Just copy/paste the following into your index.html file: