Hi everybody...

Im new user on kde4...lots of changes was made, but i can figured out lots of them trying here and there and now all my kde4 is customized just i like...

But theres just one thing i cant figure out yet...how put transparency in the toolbar? (that bar in botton of the screen, with the clock, widgets, kmenu windows opened etc)...

Someone know?

The correct term is "panel". The transparency is set by your Workspace theme (in 4.4: System Settings -> Appearance -> Style -> Workspace). If you like the look of the other components (widget backgrounds etc.) and only want to change the panel style, you can create a customized theme in System Settings -> Advanced -> Desktop Theme Details.