Examples of UI Indicators for Live Support

Looking for an indicator example that would be the best way that indicates live support is available for a site. Any current examples that do this successfully? Site examples?
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Visual Indicators for editable content and non editable content

Brief Product Description:
So I have been working on a digital project where the product is an online presentation software where the user(Teacher) has presentation slides to select and conducts presentations to the students.
Problem: The …