Spacer
Let you add a Spacer object to your form in order to help you in the form organisation.
Object designer
Object parameters
Double-click on the object to edit it. Object parameters dialog will pop-up.
If the separator has a color different from null and height greater the 0px, Spacer will draw a separator line.
Separator color
Let you define the color of the separator
Height
Set the number of pixels of the separator