CadSoft Eagle - PCB Layout Software - Schematics - Name and Value tool

The Name tool will allow you to name the part, or name the net, or other feature that may be on the schematic. The behavior of the name tool will vary with the thing you are naming. If you name a net for instance, and another net has the same name, the two next will be considered as a connection between the two nets. The value tool will allow you to specify a particular value for the part. This can be any value that you feel will help you in identifying the part for use in the project. For example, if a capacitor is on the schematic, it might need a value like 22 pF to specify the capacitance.