On PCs:
Hold dow the right "ALT"
key. Let it go. Press the letter or character.
Por ejemplo: If you want
an é, press right "ALT", release it, then press the "e" on the keyboard.
When
using the internet or email, use this technique:
(Use the numbers on the keypad to the
right.)
alt + 160= á
alt + 130= é
alt + 144= É
alt + 161= í
alt + 162= ó
(Spanish quotation marks)
alt + 163= ú
alt + 174= «
alt + 164= ñ
alt + 175= »
alt + 165= Ñ
alt + 168= ¿
alt + 173= ¡
Here's a link to a more comprehensive list!
We hope this is helpful!