Where to have line judges go?

[DaveASA/FED]

Ok, was watching a match last night and server was coming near line judge. The officials had the line judges back up to get out of servers periferial vision in line with the side line. I had always told them to back up either at an angle to the corner or in line with the end line to look for a foot fault. I see the thinking in both, foot fault is important, but if you can't see the side line who will call a shot right on the line?? Where do you have your line judges go to get out of the way on a left corner server??