Modify layer status and properties in a viewport and not affect other viewports
Freeze Layers in Viewport
If you freeze a layer in normal way, it's invisible in all viewports
Select "Freeze or thaw in current viewport", layer only frozen in current viewport but not other
Override Layer Properties in Viewport
Layer properties like Color, Linetype, Lineweight, Transparency, Plot Style can be modify per viewport
If you change the VP Color, VP Linetype, VP Lineweight, VP Transpancy, VP Plot Style; it only affect the current viewport
If the layer properties is override, it will highlight in the layer list
Viewport Override Layer filter automatically created
Same layer over different viewport show different properties