## Knob

A knob widget that can be used to write or read a numeric PV.

### Operations

At runtime, dragging the thumb to increase/decrease value in step specified in property `Increment`.

### Special Properties

- Knob Color (knob_color)
    Color of the knob.
- Thumb Color (thumb_color)
    Color of the thumb.
- Increment (increment)
    The least increment/decrement step while dragging the thumb.
- Show Value Label (show_value_label)
    Show value label on the knob.

### See Also

- Properties Common to Scaled Widgets
- Properties Common to PV Widgets
- Properties Common to All Widgets