TextFormat Margins for dynamic Textfield

I got a text field dynamically displaying titles from an XML file in a “callout” style popup. and I managed to add some left/right margin with:

var nameFormat:TextFormat = new TextFormat();
nameFormat.leftMargin = 10;
nameFormat.rightMargin = 10;

Is there anything equivalent or another easy way to add extra top/bottom margins? I can’t find anything in the doc…