disabling F4 opening large files

[Martin Vegter <martin vegter aol com>]

Dear list,

when I press F4, midnight opens selected file in my editor. This happens
for all files, even for video, mp3, iso image,... This obviously makes
no sense. Is there a way to disable F4 for specified files ?

in mc.ext, I see only the binding for F3 and ENTER
Open=
View=

Which brings me to my second point:

Is it possible to disable executing an executable when pressed ENTER ?

many thanks,
Martin