You can define the size of the slide programmatically, by using the size property.
To change the way the slide increments/decrements, you need some more programming.
I have included the VI, that will change the current value of the slide depending on what you select on the bottom edge of the slide (I used Booleans for this). If the value selected is greater than the current value of the slide, the two will be added to give the new slide value.
If the value selected is smaller than the current slide value, it will be subtracted.
If the two values are the same, the slide value will stay the same.
The VI was build in LabVIEW 6i.
Zvezdana S.
National Instruments