Creo 2 - Transparency display style

In Wildfire 5 oops Creo Elephants Pro, there was a transparency option along with hidden, wireframe & shaded in the model display drop-down, but now we have moved to Creo 2 the transparency option has disappeared! If I try to customize the ribbon etc, I can find the transparency command, but I cannot drag it anywhere to add it to the menus.

This is really annoying as I use this transparency quite a often. I kow I can access it using the display manager using a diffrent style, but that is more than two clicks away compared to the previous drop-down option.

Can anyone help please.

TIA

Jeff