https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2014/08/19/howto-quickly-test-a-webpage-in-different-internet-explorer-versions.aspxI just noticed that on Internet Explorer 11 developer tools console (appears when you press F12 key), there is a drop-down where you can select the rendering engine used. Edge means the very latest (IE11 one in this case) and you can select back to versionelCommunityServer 2.1 SP3 (Build: 20423.1)