We use chromecast in our office for our meetings. We decided this was cheaper & easier than running a long hdmi or ethernet (w/ hdmi extenders). This works great until you want to share a desktop application.

Most people say "just use the cast entire screen feature":

This does not work with (well) with dual monitors!

So here are the steps on how to share a SINGLE screen on a dual/multi-monitor setup with chromecast:

  • Share your single screen with https://join.me
  • copy the join.me link to a tab in chrome
  • When you can see your desktop in that tab... chromecast it (that tab, not the entire screen)

Quick image tutorial of the steps above: