Use the following syntax to specify the rampValue attribute:
rampValue="integer"
where integer is a positive (non-zero) number.
For the rampButton, if the rampType attribute is down, the value is decreased by this amount. If the rampType attribute is up, the value is increased by this amount.
For the numericInputEnable and numericInputCursorPoint graphic objects, if the takeFocusOnPress attribute is true, when the user presses a Move Up Key button or the cursor up key, the value is increased by this amount. When the user presses a Move Down Key button or the cursor down key, the value is decreased by this amount. If the ramp value is set to zero, the ramp functionality is disabled.