treegrid css simple question

[crosemffet]

in my treegrid, I've reduced the font size from 12px to 9px.
everything works fine, except icons remains not aligned with texts (text needs to be moved 2 pixels downside).
I've been searching in css styles, and could'n find it.
please can be someone so kind to tell me where should I modify / add padding or property to move down 2 pixels the text shown in each row / cell in a treegrid?
thanks in advance, 

[stworthy]

How do you change the font size? Please try to add the code below to your page.

Code:

<style type="text/css">
	.datagrid-cell,.datagrid-cell-group,.datagrid-header-rownumber,.datagrid-cell-rownumber{
		font-size:9px;
	}
	.tree-title{
		font-size:9px;
	}
</style>