Yamaha DME Designer Owner's Manual page 267

Knob
You can change the way knobs operate, using the [Component Editor] tab
in the "Preferences" dialog box.
Circular
The knob is dragged following its shape, as though you were drawing a circle.
Linear
As you drag the knob to the upper, the value increases. Dragging it down decreases the value.
NOTE
To make a finer setting, press the <Shift> key while dragging the knob.
If you click a knob while pressing the <Ctrl> key, the setting will return to its default value.
Chapter 5 Components
[Knob Mode] setting
DME Designer Owner's Manual 267