Hello,
The answere is yes. Right-click on the control and choose "Advanced>>Customize..." You will then have the opertunity to modify the control the way you want. To change size on the increment/decrement buttons you first have to change to "Customize Mode" by clicking the tool left of the "Control Ringbox".(Or Ctrl+M or in the operate menu)
Now you can change size of all the components of the control including the increment/decrement buttons.
Robert S
Applications Engineer
National Instruments Sweden