How do you stop words from being over-written in Word?

How do you stop words from being over-written in Word?

all of a sudden when I try to edit text in Word, instead of adding text before letters it deletes/overwrites whatever is written infront of it. How can i stop this? I need this work done for tommorow and I can't do it when this happens

*sorry for yet again asking for help You can delete this thread after I've sorted this out.

u tried pressing the "insert" key?

ohhh. I must've pressed it by mistake

What a fucking retard of a key! I might rip it off my keyboard.
Cheers!

took me ages to work that one out.
nee bother

i'm going to make it a sticky thread

this is gcse IT stuff, sort it oot