:'<,'>s/pattern/replacement/g
When you make a visual selection and then type :, Vim automatically inserts ' as the range — the marks for the start and end of the last visual selection.
vaB
The aB text object (around Block) selects everything from the matching { to the closing } — including the braces themselves.
vis
The is (inner sentence) text object selects the sentence the cursor is in — excluding any leading or trailing whitespace that separates sentences.
va"
Vim's text objects let you select structured regions of text with two-keystroke shortcuts.
vas
The vas command visually selects the current sentence, including surrounding whitespace.
<C-v>I#<Esc>
Vim's Visual Block mode lets you prepend characters (like comment markers) to multiple lines simultaneously.
U
In visual mode, pressing U converts all selected characters to uppercase and u converts them to lowercase.
O in visual block mode
In visual block mode (), pressing O (uppercase) moves the cursor to the diagonally opposite corner of the rectangular selection.
vii with indent-object plugin
The vim-indent-object plugin provides ii (inner indent) and ai (around indent) text objects.
v'a
Press v for visual mode, then 'a to extend the selection to mark a.
<C-v>jj<C-a>
Select numbers with visual block mode , then press to increment all selected numbers by 1.
"_dP in visual mode
Use "_dP which deletes the selection into the black hole register and pastes before.
<C-v>jjll
Press for visual block mode, then use movement keys to select a rectangle.
<C-v>j$
In visual block mode, press $ to extend each line's selection to its end, even if lines have different lengths.
S) with vim-surround
With the vim-surround plugin, select text visually and press S) to wrap with parentheses.
v$
Press v to enter character-wise visual mode, then $ to extend selection to the end of the line (excluding the newline).
vit
Press vit to select the inner content of the nearest HTML/XML tag.
:'<,'>!nl -ba
Select lines visually, then run :'!nl -ba to pipe through the nl command which prepends line numbers to each selected line.
:'<,'>!sort -u
Select lines, then type ! which auto-expands to :'!.
gq in visual mode
Select text with v or V, then press gq to format the selection according to textwidth.
