TCnTrackBar.SmallChange Property
Gets or sets the value added to or subtracted from the Value property when the scroll box is moved a small distance.
published property SmallChange: Integer read GetSmallChange write SetSmallChange default 1;
Property Value
Type: Integer
When the user presses one of the arrow keys, the Value property changes according to the value set in the SmallChange property.
You might consider setting the
value of SmallChange to a percentage of the value of the Height (for a
vertically oriented track bar) or Width (for a horizontally oriented
track bar) property. This sets the distance your track bar moves
proportionate to its size.