Navigate to the site you want to open in IE mode.
You will notice a lock in the upper left corner. This indicates we are in Edge mode.
Click the three dots in the upper right corner, then select reload in Internet Explorer mode.
You will then receive a pop up.
Toggle the "open this page in Compatibility mode" to on to open your page in IE mode.
Toggle the "open this page in IE mode next time" if you would like Edge to remember this page every time you go to it.
You will notice that to the left of the lock you now see the IE icon. This is a visual reminder that you are in IE mode.