Writing some characters require a combination of keys that include the [alt] key and some digits from the numeric pad. For instance, [alt]+ will write a Spanish quote («). Such combinations only work when the numeric block is set. When it isn't, the combination will run a completely different action, which may include leaving the current page, landing somewhere else, and losing some work in the process.
Is there a way to avoid running these completely different actions, when I try to write the special character, but the numeric block has been accidentally unset?