Windows XP. When at a dos prompt, I can use the F1 key to bring back the previous command one character at a time or use the F3 key to bring back the whole of the last command. What I cannot do is edit the command by inserting characters ie if I use F1 to get characters to where I want to insert a character, type in my new character, then press F1 again, I find I have overwritten a character rather than inserted a character. Could you please explain how I can insert instead of overwriting.