How do I set 100% width and height? for WEBGL?

Development Platform & Builds
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How do I set 100% width and height? for WEBGL??? No matter what I changed I could not set it to 100% What needs to change in settings and HTML for this to happen? I want it to be stretched over the entire browser space. (Not full screen like in full screen button)

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Hi, have you tried this Setting default res for HTML - Platform & Builds - Unreal Engine Forums