You can draw a bubble knob control on a panel diagram.
About this task
The bubble knob control is an input/output
control, as shown in the following figure in its default non‑animated
appearance:
Note the following information:
- You can bind (map) it to an attribute.
- Its attribute type is a Number.
- By default its control direction is set to In/Out,
though you can change it to In or Out.