StepSize - property of the PmfNumber object
Setting of the step (value greater than 0), the value is increased/decreased by when clicking the spin buttons ("up"/"down" buttons) while editing.
Property access for read and write
This property is also functional in Web panels.
If the property is not set
then it rerturns the value null
In such case the spin button step is preset to 1 for integer (when Subtype=int) and 0.5 for real number (when Subtype=float).
var oNumber = oForm.CreateItem("number", "Id1", "number of rows");
var nStepSize = oNumber.StepSize; //Reading the value
oNumber.StepSize = 2; //Writing the value