Set Display Style button is missing in Pr CC 2015

Hi Guys,

I recently upgraded to Premiere Pro CC 2015 and I wanted to change something in the way clips are presented in the timeline.  No problem, just need to clip on the "Set Display Style" button.  OK, so, where did my button go???

I must admit, I never previously paid much attention to it and never actually used it in the past.  Now that I wanted to change something, I can't find the button.  (See screenshot below) Come to think of it, there is no longer the little triangle icon to expand or contract the track vertically (although double-clicking the track does the trick).

Can anybody please help me?

Thanks! :-)

CB

My System Details:

Adobe Creative Cloud Member

Software:  Adobe Premiere Pro CC 2015 (Release 2015.0.2)

CPU:  i7-950 @ 3.06 GHz

GPU:  nVidia GeForce GTX 670

RAM:  24GB DDR3

OS:  Windows 10 Professional (64-bit)