Audio Scaling of Take Lanes

It seems that the only way to adjust audio scaling on multiple take lanes is to adjust each lane individually using the audio scaling ruler. I was hoping that the shortcuts indicated in the documentation for adjusting the scaling of all tracks together would work for take lanes. I tried holding down the CTRL key and clicking on the vertical zoom in/out button and the take lanes scaling stayed the same. I also tried holding the ALT key and pressing the up/down arrow keys and got the same result. If I have the take lanes not visible it appears that the main clips audio scaling does change using these shortcuts, but when I open the take lanes I see that the scaling has not changed. Not a big deal. I just thought I might have been doing something wrong. Have I exhausted all my options in trying to achieve this?
 
- Mike