Here’s a cool shortcut, added in SOLIDWORKS 2012, to hide and show components in an assembly; “Tab” key.
If you move your mouse over a component and press the “Tab” key, the component gets hidden. If you hold “Shift“+”Tab“, it will bring the component back. Try holding the “Tab” key down and moving your mouse over the assembly and see what happens.
You can learn some other good tips in regards to assemblies in the Assembly Training Class. We will cover everything from Top-Down assembly modeling, to all the selection capabilities, to working with large assemblies.