What style governs the overflow for tree column in TreeGrid?

I would like to set the style for the first column in my treegrid to ellipse for text overflow. I have been able to change the overflow from hidden to ellipse for all the columns (by changing div.gridbox table.obj td) but don’t see what style to change for my first (tree type) column.

Try to use something similar:

<style> div.gridbox table.row20px tr td, div.gridbox table.row20px tr td div{ overflow: visible !important; }; </style>