I'm trying to make a change in the' IAC' gauge group. Idle Air reference position curve in this gauge group is for a PWM valve. I have a stepper valve. Switching to edit mode and right click on Idle air valve reference position curve then selecting 'Change Curve To' the window that opens goes off the screen right and I cannot figure out how to scroll across to the curve I am after. The highlighted item will move off screen using the right arrow, but no way to work out what it is highlighting.

This might be something simple, i'm no computer whiz. How do I select the correct curve when I cannot see it? What do I change in Vemstune, or in Windows to allow me to scroll across and view all the available curve selections?