While editing a file in vim you can temporarily turn on the highlight search option by typing:

:set hlsearch

To automatically highlight search patterns in vim, first edit your .vimrc file:

vim ~/.vimrc

and then add this line:

set hlsearch
Dayne Dayne (57)

You probably already know how to use vim's basic undo and redo features. For a quick refresher, read this short tutorial on how to use vim redo and undo.