With the latest versions of OS X, iOS and Keynote, you can use your iOS device as a sophisticated remote control for presentations running on your Mac. This lets you hook your Mac up to a projector or TV across the room and control it with your iPhone or iPad. You get much more than just basic buttons, as you can see the slide on your device and even draw on the slides with the results showing up on the Mac that is running the presentation.
The HTML5 videos don't fill the screen in Safari under Mac OS X 10.10!
Sorry! I found that the Safari Extension "YoutubeWide 10.0" seems to be the culprit. Turning off this extension seems to take care of the problem.
What if I don't have access to the wi-fi network at the location. Can I use the hotspot on my iPhone to use Remote?
It is confusing as to whether or not Keynote can be controlled remotely over Bluetooth. Keynote on the Mac says WiFi, on the iOS device it says WiFi or Bluetooth. Had some success with Bluetooth but the connection between the Mac and iOS device would drop frequently. Any insight on this?