Increases the bottom margin of the 3×3 texture box.
A higher value means more of the source texture is considered to be part of the bottom border of the 3×3 box.
This is also the value used as fallback for StyleBox.contentMarginBottom if it is negative.
Increases the bottom margin of the 3×3 texture box. A higher value means more of the source texture is considered to be part of the bottom border of the 3×3 box. This is also the value used as fallback for StyleBox.contentMarginBottom if it is negative.