I've come to like vi, but I am plagued by not being able to delete characters. I can delete lines with the ":delete" command but I can't find a way to delete single characters. anybody know?????

my other problem is that when I reopen a file with vi and try to edit a line, it wont overwrite characters, it just adds the character i typed and pushes the others forward. When I create new lines it overwrites any characters i want, but not editing the old line. Is there a way to turn on overwrite or something?

(in case my system info matters for either of those questions, I run macosx and a tcsh shell)

Thanks, Blip