Symbol 3399 from ISO 7000 - Title/Meaning: Advanced settings, general Function/description: To identify the control that provides access to advanced or next level settings and setup functions.
pay attention to orientation of symbolAdditional information: 
The filled circle may be deleted and replaced by an appropriate symbol for the relevant function.
Own work using: iso.org/obp/graphics/grs/d1f3f416-d48e-4083-a0c2-c48f553089bc 200.png
Vectorization:  Mrmw