Should you need to see which version of Chrome OS your Chromebook is running, you can view it and a bunch of other detailed information about the OS in the Settings app. Here's how to find it.

After you sign in to your account, click on the clock in the bottom right to open the system tray and notification panel. From there, click on the Settings cog.

Click the time, then click on the Settings cog

Next, click the hamburger menu icon and then click on “About Chrome OS” at the bottom of the menu.

Click the Hamburger menu, then on About Chrome OS

This is where you can see the current version of Chrome OS you're running. If your system isn't updated, here is where you update your Chromebook.

Related: How to Update Your Chromebook

Just underneath the Google Chrome OS logo, lays the current version your Chromebook is running.

If you want to view more details about the version of Chrome OS you're using, click the "Detailed Build Information" button.

Just underneath the Google Chrome OS logo, lays the current version your Chromebook is running.

Here, you can view even more about Chrome OS, such as the platform, firmware, the channel---and how to change it---among other geeky information.

Related: How to Get Access to Experimental Features in Chrome (and on Chromebooks)

Just underneath the Google Chrome OS logo, lays the current version your Chromebook is running.
Inside, you will find a plethora of geeky goodies your eyes will feast upon. Enjoy.

There you go. When you're done, simply close the window to return to the desktop.