Press Alt+Backspace again, to fill the area with yellow.
Press Ctrl+D to deselect.
4 - Applying Effects to the menu and buttons On the layers list, select your grey layer and double-click on it (or Right-click, Blending Options.)
Tick the four effects at the left, as shown on the diagram.
Drop Shadow and Contour need no alteration.
Click on Bevel and Emboss, and change the Gloss Contour to "Ring". This gives the object nice, shiny edges. If you don't do this, you'll end up with the normal bevel effect, which makes your object look like play-dough.

5 - Changing the Gradient Overlay settings Set the variables as shown. I've highlighted the options that need to be changed.

To change the gradient to the zebra pattern in the picture, click on it. (Don't click the arrow.) In the gradient window, insert a few new black and white tabs, as shown.

6 - The finished product In the layers list, right-click on your grey layer, and click Copy Layer Style.
Click on each of your button layers, and press Paste Layer Style.
There you have it, a nice silver menu bar, with gold buttons. Put black text on your buttons, and you're done.