How to apply padding property

how to apply padding property to tms components.
I have a main TWebPanel and inside 3 TWebPanel align to the Top. I would like to have padding inside main panel to have Xpixels between each panel inside.

Using AlignWithMargins on the child panels?

Is this feature use Margin or Padding of parent component ?

Margins of the child control and AlignWithMargins of the child control.

Ok thanks
so Padding is no effect ?

At this moment, it is not used for TWebPanel.