9.3. Operator Plus Motion

Notes taken from Practical Vim by Drew Neil

Operators

c,d,y,gU
g~ # swap case
gu # make lowercase
! # filter(motion) lines through an external program
= # Autoindent
< # shift left
> # shift right

Operator+motion

gUaw # to convert the current word to uppercase.
dap # delete a paragraph
gUap # Make a paragraph to uppercase

Duplicate act on the current line.

dd # delete the line
>> # indent the line
gUgU # or gUU to uppercase the line

tpope/vim-commentary

This comments and uncomments as well. Use . for repeating.

3\\j # comment out 3 lines below including the current line
4\\k # comment out 4 lines above including the current line
\\ap # or gcap tocomment out a paragraph
\\G # comment out the current line to the end of the file
\\\ # or gcc to comment the current line
gcu # to uncomment

kana/vim-textobj-entire

Read about indentation without plugins.

gg=G # autoindent the entire file
# if you have vim-textobj-entire
=ae # or =ie
# if you have vim-textobj-entire and vim-commentary
\\ae # comment entire file and indent at the same time