I do this all the time:
Edit a file, go back to the terminal and execute the script I'm writing… only to realize that I haven't written it to disk yet.
How do I make it so that vim is basically shouting at my eyes whenever the file is unwritten? That tiny [+] isn't good enough. Ideally, I'd like to either increase the number of red plusses being shown, or something more drastic.
FOR INSTANCE, I'm using powerline (purely in an attempt to get a more noticeable 'file has been modified' notifier). I think it'd be pretty great if the main colour at the bottom of the bar changed whenever the file has not been saved.
Any ideas?
You can set vim to display the file modified flag 5 times if you want.
set statusline+=%m
This adds it one time. Increase the number of "%m" to whatever number you want. Further explanations and tricks here: http://got-ravings.blogspot.co.at/2008/08/vim-pr0n-making-statuslines-that-own.html