Tags: patch This patch allow warn to user if current line exceeds display-fill-column-indicator-column. When current line exceeds display-fill-column-indicator-column ... | (print "......................................") | ... fill-column indicator face will change ^ temporarily to a noticeable face to warn the user that the current column is getting too long. I also wanted to do the same for indicator character but I couldn't find a way to implement it. (I hope this feature has been understood)