Symbol 2965 from ISO 7000 - Title/Meaning: Roof transparency 
Function/description: To identify the control or the malfunction indicator for the system that allows users to adjust the transparency of roof glazing from clear (transparent) to opaque.
Own work using: iso.org/obp/graphics/grs/9bfb9c5f-8db4-4771-8ba4-f79dc40c8702 200.png
Vectorization:  Mrmw