In a precedent question about plus and minus icon, you answer me :
The icons can be removed for some items by using
but there is no option , which will hide icons for all items in the tree.
and define next css rule
if i use your 2nd technic, i have a blank between the border and my tree node. I have tried to change the with propriety of dhx_tree_textSign class. But if i take it to 0px, i have no space in my tree and all level are at the same place. Do you have a solution to hide the plus/minus icon and see the tree at the good place?