How to change opacity scale of a Gadget

In Vista,there is enough scope to change the opacity level of a gadget.

How To:-

Simply right click on a gadget present on the sidebar of Vista desktop and select Opacity.Yo can change it's scale to the following percents:-
20%,40%,60%,80% and 100%.

[It's a beta OS so things may change in the later or final version]