:s (:substitute) is one of the first commands any Vim user learns. There are several similar commands that are more generic. Like :s, these commands can take a range; however, unlike :s, there is no % variant, as these commands are global by nature.:g (:global):v (:vglobal) (equivalent to :g!):g, but targets strings that do NOT match.g/pattern/_d puts deleted lines in the null register, which has no performance cost.y a, each yank would overwrite the previous yank.:norm:exe:norm, you might notice that you can't insert linebreaks -- and <CR> is literally printed as the strings "\r" and "". :exec(ute) lets us actually pass in commands as strings to be executed, like eval()."norm!" and "A\r" to the pattern. Before execution, the second is evaluated to "append carriage return."