faq:browser-compatibility-mode

Internet Explorer Compatibility mode

HippoEDIT uses embedded Internet Explorer for previewing HTML pages and displaying documentation. Internet Explorer running in embedded mode (as WebBrowser Control) is not always the same, as standalone version. So, it has own settings, which differ from standalone IE and which can be set explicitly for HippoEDIT (or other app using WebBrowser control).

By default, embedded Internet Explorer in HippoEDIT runs in IE 9 compatibility mode, to allow old fashion pages run without problems. if you do not like the default value, you can set it to any value you need (IE10, IE11 etc).
The setting is controlled by following registry setting:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION

More details can be found on Microsoft website).

Below an example registry script to set the value to IE11:

hippoedit_ie.reg
Windows Registry Editor Version 5.00
 
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION]
"hippoedit.exe"=dword:00002af8