I suppose you mean the keys of a normal keyboard... After you add the spanish keyboard in your os, you press the key " and then a vowel. And you can get these: áéíóú

á Hold down ALT and type 160 or Hold down ALT and type 0225 é Hold down ALT and type 130 or Hold down ALT and type 0233 í Hold down ALT and type 161 or Hold down ALT and type 0237 ó Hold down ALT and type 162 or Hold down ALT and type 0243 ú Hold down ALT and type 163 or Hold down ALT and type 0250 Á Hold down ALT and type 0193 É Hold down ALT and type 0201 Í Hold down ALT and type 0205 Ó Hold down ALT and type 0211 Ú Hold down ALT and type 0218

Just press alt key and numbers. For example á es alt + 160. Then play around with your keyboard to discover more features.

is Relative. Depends on your keyboard and regional configuration.