Just as a side note, you *can* make the 3D border transparent, though the method to do so is a little obscure.
Set a control on the front panel, switch to the paint brush tool, and
right click on the border to bring up the color dialog. Press
spacebar to switch to the background color, and select transparent.
This isn't my method, btw, I'm just repeating what others have
posted. I believe I first saw this posted from a NI dev, though I
don't recall which one.