Sliding Glass Door Windows - Can't change orientation

[JohnRLee]

HD Pro 2014

I give up. I've tried everything to get the slider door orientation to change. There is only one option to drag over in these types of doors. I don't see anything in the library for other choices. Default orientation (looking from the outside) is for the left window to be the one that moves (slides from left to right). I have one in my plan that I'd like to reverse.

When you click on the properties, there is a reverse symbol box on the "general" tab, but that cannot be checked (it appears to be grayed out). I didn't see any of the other properties tabs that would effect a change.

Am I missing something?