vim move the current line to scrolltop of the screen

move the current line to scrolltop
zt
move the current line to scrollbottom
zb

How to set TAB to 4 spaces in vim?

set ts=4

vim regular expression

* matches 0 or more of the preceding characters, ranges or metacharacters
.* matches everything including empty line
\+ matches 1 or more of the preceding characters...