HDMI Questions

I have a Rpi3 running Dietpi.

  1. Is HDMI disabled by default in Dietpi? If so, how do I enable it?
  2. Does the HDMI output in the Rpi3 handle multichannel?
  3. How do I know HDMI status?
  1. Enabled by default, 1080p output, 720p framebuffer
  2. Unknown, however, will be the same as per Raspbian
  3. https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=52309