All commands below are in normal mode unless specified otherwise.
Hit esc
on keyboard to enter normal mode.
/
search forward, ?
search backward, for example
?text
search backward for the word "text", /text\c
case-insensitive search
:let @/ = ""
clear search context;
:%s/text/replacement/gic
interactive search. y - replace, n - skip, a - all, q - quit, l - replace one and quit