Thank you for writing.
I have prepared a small example application that demonstrates how to use the MinSize
property to align Far Images on the right. Also, I have used the "Telerik" theme to change the small triangles to plus/minus signs. You should have in mind that these symbols actually are pictures and you could change them using the theme. Also, a symbol has only node that already has children nodes.
Please find an example attached to this message.
If you need additional assistance, do not hesitate to contact me again.
the Telerik team