Note

Most long options have the opposite version with --no- prefix.

Search mode

-x, --extended

Extended-search mode. Since 0.10.9, this is enabled by default. You can disable it with +x or --no-extended.

-e, --exact

Enable exact-match

-i, --ignore-case

Case-insensitive match (default: smart-case match)

+i, --no-ignore-case

Case-sensitive match

--literal

Do not normalize latin script letters for matching.

--scheme=SCHEME

Choose scoring scheme tailored for different types of input.

--algo=TYPE

Fuzzy matching algorithm (default: v2)

v2 Optimal scoring algorithm (quality)
v1 Faster but not guaranteed to find the optimal result (performance)

-n, --nth=N[,..]

Comma-separated list of field index expressions for limiting search scope. See FIELD INDEX EXPRESSION for the details. When you use this option with --with-nth, the field index expressions are calculated against the transformed lines (unlike in --preview where fields are extracted from the original lines) because fzf doesn't allow searching against the hidden fields.

--with-nth=N[,..]

Transform the presentation of each line using field index expressions

-d, --delimiter=STR

Field delimiter regex for --nth, --with-nth, and field index expressions (default: AWK-style)

--disabled

Do not perform search. With this option, fzf becomes a simple selector interface rather than a "fuzzy finder". You can later enable the search using enable-search or toggle-search action.

Search result

+s, --no-sort

Do not sort the result

--tail=NUM

Maximum number of items to keep in memory. This is useful when you want to browse an endless stream of data (e.g. log stream) with fzf while limiting memory usage.

--track

Make fzf track the current selection when the result list is updated. This can be useful when browsing logs using fzf with sorting disabled. It is not recommended to use this option with --tac as the resulting behavior can be confusing. Also, consider using track action instead of this option.

--tac

Reverse the order of the input

--tiebreak=CRI[,..]

Comma-separated list of sort criteria to apply when the scores are tied.

length Prefers line with shorter length
chunk Prefers line with shorter matched chunk (delimited by whitespaces)
begin Prefers line with matched substring closer to the beginning
end Prefers line with matched substring closer to the end
index Prefers line that appeared earlier in the input stream

- Each criterion should appear only once in the list
- index is only allowed at the end of the list
- index is implicitly appended to the list when not specified
- Default is length (or equivalently length,index)
- If end is found in the list, fzf will scan each line backwards

Interface

-m, --multi

Enable multi-select with tab/shift-tab. It optionally takes an integer argument which denotes the maximum number of items that can be selected.

+m, --no-multi

Disable multi-select

--no-mouse

Disable mouse

--bind=KEYBINDS

Comma-separated list of custom key bindings. See KEY/EVENT BINDINGS for the details.

--cycle

Enable cyclic scroll

--wrap

Enable line wrap

--wrap-sign=INDICATOR

Indicator for wrapped lines. The default is '↳ ' or '> ' depending on --no-unicode.

--no-multi-line

Disable multi-line display of items when using --read0

--gap[=N]

Render empty lines between each item

--keep-right

Keep the right end of the line visible when it's too long. Effective only when the query string is empty.

--scroll-off=LINES

Number of screen lines to keep above or below when scrolling to the top or to the bottom (default: 3).

--no-hscroll

Disable horizontal scroll

--hscroll-off=COLS

Number of screen columns to keep to the right of the highlighted substring (default: 10). Setting it to a large value will cause the text to be positioned on the center of the screen.

--filepath-word

Make word-wise movements and actions respect path separators. The following actions are affected:

backward-kill-word
backward-word
forward-word
kill-word

--jump-labels=CHARS

Label characters for jump mode.

Layout

--height=[~]HEIGHT[%]

Display fzf window below the cursor with the given height instead of using the full screen.

If a negative value is specified, the height is calculated as the terminal height minus the given value.

fzf --height=-1

When prefixed with ~, fzf will automatically determine the height in the range according to the input size.

# Will not take up 100% of the screen
seq 5 | fzf --height=~100%

Adaptive height has the following limitations:
* Cannot be used with top/bottom margin and padding given in percent size
* Negative value is not allowed
* It will not find the right size when there are multi-line items

--min-height=HEIGHT

Minimum height when --height is given in percent (default: 10). Ignored when --height is not specified.

--tmux[=[center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]]

Start fzf in a tmux popup (default center,50%). Requires tmux 3.3 or later. This option is ignored if you are not running fzf inside tmux.

e.g.
# Popup in the center with 70% width and height
fzf --tmux 70%

# Popup on the left with 40% width and 100% height
fzf --tmux right,40%

# Popup on the bottom with 100% width and 30% height
fzf --tmux bottom,30%

# Popup on the top with 80% width and 40% height
fzf --tmux top,80%,40%

--layout=LAYOUT

Choose the layout (default: default)

default Display from the bottom of the screen
reverse Display from the top of the screen
reverse-list Display from the top of the screen, prompt at the bottom

--reverse

A synonym for --layout=reverse

--border[=BORDER_OPT]

Draw border around the finder

rounded Border with rounded corners (default)
sharp Border with sharp corners
bold Border with bold lines
double Border with double lines
block Border using block elements; suitable when using different background colors
thinblock Border using legacy computing symbols; may not be displayed on some terminals
horizontal Horizontal lines above and below the finder
vertical Vertical lines on each side of the finder
top (up)
bottom (down)
left
right
none

If you use a terminal emulator where each box-drawing character takes 2 columns, try setting --ambidouble. If the border is still not properly rendered, set --no-unicode.

--border-label[=LABEL]

Label to print on the horizontal border line. Should be used with one of the following --border options.

* rounded
* sharp
* bold
* double
* horizontal
* top (up)
* bottom (down)

e.g.
# ANSI color codes are supported
# (with https://github.com/busyloop/lolcat)
label=$(curl -s http://metaphorpsum.com/sentences/1 | lolcat -f)

# Border label at the center
fzf --height=10 --border --border-label="╢ $label ╟" --color=label:italic:black

# Left-aligned (positive integer)
fzf --height=10 --border --border-label="╢ $label ╟" --border-label-pos=3 --color=label:italic:black

# Right-aligned (negative integer) on the bottom line (:bottom)
fzf --height=10 --border --border-label="╢ $label ╟" --border-label-pos=-3:bottom --color=label:italic:black

--border-label-pos[=N[:top|bottom]]

Position of the border label on the border line. Specify a positive integer as the column position from the left. Specify a negative integer to right-align the label. Label is printed on the top border line by default, add :bottom to put it on the border line on the bottom. The default value 0 (or center) will put the label at the center of the border line.

--no-unicode

Use ASCII characters instead of Unicode drawing characters to draw borders, the spinner and the horizontal separator.

--ambidouble

Set this option if your terminal displays ambiguous width characters (e.g. box-drawing characters for borders) as 2 columns.

--margin=MARGIN

Comma-separated expression for margins around the finder.

--padding=PADDING

Comma-separated expression for padding inside the border. Padding is distinguishable from margin only when --border option is used.

e.g.
fzf --margin 5% --padding 5% --border --preview 'cat {}' \
--color bg:#222222,preview-bg:#333333

--info=STYLE

Determines the display style of the finder info. (e.g. match counter, loading indicator, etc.)

default On the left end of the horizontal separator
right On the right end of the horizontal separator
hidden Do not display finder info
inline After the prompt with the default prefix ' < '
inline:PREFIX After the prompt with a non-default prefix
inline-right On the right end of the prompt line
inline-right:PREFIX On the right end of the prompt line with a custom prefix

--info-command=COMMAND

Command to generate the finder info line. The command runs synchronously and blocks the UI until completion, so make sure that it's fast. ANSI color codes are supported. $FZF_INFO variable is set to the original info text. For additional environment variables available to the command, see the section ENVIRONMENT VARIABLES EXPORTED TO CHILD PROCESSES.

e.g.
# Prepend the current cursor position in yellow
fzf --info-command='echo -e "\x1b[33;1m$FZF_POS\x1b[m/$FZF_INFO 💛"'

--no-info

A synonym for --info=hidden

--separator=STR

The given string will be repeated to form the horizontal separator on the info line (default: '─' or '-' depending on --no-unicode).

ANSI color codes are supported.

--no-separator

Do not display horizontal separator on the info line. A synonym for --separator=''

--scrollbar=CHAR1[CHAR2]

Use the given character to render scrollbar. (default: '│' or ':' depending on --no-unicode). The optional CHAR2 is used to render scrollbar of the preview window.

--no-scrollbar

Do not display scrollbar. A synonym for --scrollbar=''

--prompt=STR

Input prompt (default: '> ')

--pointer=STR

Pointer to the current line (default: '▌' or '>' depending on --no-unicode)

--marker=STR

Multi-select marker (default: '┃' or '>' depending on --no-unicode)

--marker-multi-line=STR

Multi-select marker for multi-line entries. 3 elements for top, middle, and bottom. (default: '╻┃╹' or '.|'' depending on --no-unicode)

--header=STR

The given string will be printed as the sticky header. The lines are displayed in the given order from top to bottom regardless of --layout option, and are not affected by --with-nth. ANSI color codes are processed even when --ansi is not set.

--header-lines=N

The first N lines of the input are treated as the sticky header. When --with-nth is set, the lines are transformed just like the other lines that follow.

--header-first

Print header before the prompt line

--ellipsis=STR

Ellipsis to show when line is truncated (default: '··')

Display

--ansi

Enable processing of ANSI color codes

--tabstop=SPACES

Number of spaces for a tab character (default: 8)

--color=[BASE_SCHEME][,COLOR_NAME[:ANSI_COLOR][:ANSI_ATTRIBUTES]]...

Color configuration. The name of the base color scheme is followed by custom color mappings.

--highlight-line

Highlight the whole current line

--no-bold

Do not use bold text

--black

Use black background

History

--history=HISTORY_FILE

Load search history from the specified file and update the file on completion. When enabled, CTRL-N and CTRL-P are automatically remapped to next-history and prev-history.

--history-size=N

Maximum number of entries in the history file (default: 1000). The file is automatically truncated when the number of the lines exceeds the value.

Preview

--preview=COMMAND

Execute the given command for the current line and display the result on the preview window. {} in the command is the placeholder that is replaced to the single-quoted string of the current line. To transform the replacement string, specify field index expressions between the braces (See FIELD INDEX EXPRESSION for the details).

--preview-label[=LABEL]

Label to print on the horizontal border line of the preview window. Should be used with one of the following --preview-window options.

* border-rounded (default on non-Windows platforms)
* border-sharp (default on Windows)
* border-bold
* border-double
* border-block
* border-thinblock
* border-horizontal
* border-top
* border-bottom

--preview-label-pos[=N[:top|bottom]]

Position of the border label on the border line of the preview window. Specify a positive integer as the column position from the left. Specify a negative integer to right-align the label. Label is printed on the top border line by default, add :bottom to put it on the border line on the bottom. The default value 0 (or center) will put the label at the center of the border line.

--preview-window=[POSITION][,SIZE[%]][,border-BORDER_OPT][,[no]wrap][,[no]follow][,[no]cycle][,[no]info][,[no]hidden][,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES][,default][,<SIZE_THRESHOLD(ALTERNATIVE_LAYOUT)]

Scripting

-q, --query=STR

Start the finder with the given query

-1, --select-1

If there is only one match for the initial query (--query), do not start interactive finder and automatically select the only match

-0, --exit-0

If there is no match for the initial query (--query), do not start interactive finder and exit immediately

-f, --filter=STR

Filter mode. Do not start interactive finder. When used with --no-sort, fzf becomes a fuzzy-version of grep.

--print-query

Print query as the first line

--expect=KEY[,..]

Comma-separated list of keys that can be used to complete fzf in addition to the default enter key. When this option is set, fzf will print the name of the key pressed as the first line of its output (or as the second line if --print-query is also used). The line will be empty if fzf is completed with the default enter key. If --expect option is specified multiple times, fzf will expect the union of the keys. --no-expect will clear the list.

This option is not compatible with --bind on the same key and will take precedence over it. To combine the two, use print action.

--read0

Read input delimited by ASCII NUL characters instead of newline characters

--print0

Print output delimited by ASCII NUL characters instead of newline characters

--no-clear

Do not clear finder interface on exit. If fzf was started in full screen mode, it will not switch back to the original screen, so you'll have to manually run tput rmcup to return. This option can be used to avoid flickering of the screen when your application needs to start fzf multiple times in order. (Note that in most cases, it is preferable to use reload action instead.)

e.g.
foo=$(seq 100 | fzf --no-clear) || (
# Need to manually switch back to the main screen when cancelled
tput rmcup
exit 1
) && seq "$foo" 100 | fzf

--sync

Synchronous search for multi-staged filtering. If specified, fzf will launch the finder only after the input stream is complete and the initial filtering and the associated actions (bound to any of start, load, result, or focus) are complete.

--with-shell=STR

Shell command and flags to start child processes with. On *nix Systems, the default value is $SHELL -c if $SHELL is set, otherwise sh -c. On Windows, the default value is cmd /s/c when $SHELL is not set.

--listen[=[ADDR:]PORT] --listen-unsafe[=[ADDR:]PORT]

Start HTTP server and listen on the given address. It allows external processes to send actions to perform via POST method.

- If the port number is omitted or given as 0, fzf will automatically choose a port and export it as FZF_PORT environment variable to the child processes

- If FZF_API_KEY environment variable is set, the server would require sending an API key with the same value in the x-api-key HTTP header

- FZF_API_KEY is required for a non-localhost listen address

- To allow remote process execution, use --listen-unsafe

e.g.
# Start HTTP server on port 6266
fzf --listen 6266

# Send action to the server
curl -XPOST localhost:6266 -d 'reload(seq 100)+change-prompt(hundred> )'

# Get program state in JSON format (experimental)
# * Make sure NOT to access this endpoint from execute/transform actions
# as it will result in a timeout
curl localhost:6266

# Start HTTP server on port 6266 with remote connections allowed
# * Listening on non-localhost address requires using an API key
export FZF_API_KEY="$(head -c 32 /dev/urandom | base64)"
fzf --listen 0.0.0.0:6266

# Send an authenticated action
curl -XPOST localhost:6266 -H "x-api-key: $FZF_API_KEY" -d 'change-query(yo)'

# Choose port automatically and export it as $FZF_PORT to the child process
fzf --listen --bind 'start:execute-silent:echo $FZF_PORT > /tmp/fzf-port'

Help

--version

Display version information and exit

--help

Show help message

--man

Show man page

Directory traversal

--walker=[file][,dir][,follow][,hidden]

Determines the behavior of the built-in directory walker that is used when $FZF_DEFAULT_COMMAND is not set. The default value is file,follow,hidden.

* file: Include files in the search result
* dir: Include directories in the search result
* hidden: Include and follow hidden directories
* follow: Follow symbolic links

--walker-root=DIR [...]

List of directory names to start the built-in directory walker. The default value is the current working directory.

--walker-skip=DIRS

Comma-separated list of directory names to skip during the directory walk. The default value is .git,node_modules.

Shell integration

--bash

Print script to set up Bash shell integration

e.g. eval "$(fzf --bash)"

--zsh

Print script to set up Zsh shell integration

e.g. source <(fzf --zsh)

--fish

Print script to set up Fish shell integration

e.g. fzf --fish | source

Examples

1 The 1st field
2 The 2nd field
-1 The last field
-2 The 2nd to last field
3..5 From the 3rd field to the 5th field
2.. From the 2nd field to the last field
..-3 From the 1st field to the 3rd to the last field
.. All the fields

Exact-match (quoted)

A term that is prefixed by a single-quote character (') is interpreted as an "exact-match" (or "non-fuzzy") term. fzf will search for the exact occurrences of the string.

Anchored-match

A term can be prefixed by ^, or suffixed by $ to become an anchored-match term. Then fzf will search for the lines that start with or end with the given string. An anchored-match term is also an exact-match term.

Exact-boundary-match (quoted both ends)

A single-quoted term is interpreted as an "exact-boundary-match". fzf will search for the exact occurrences of the string with both ends at the word boundaries. Unlike in regular expressions, this also sees an underscore as a word boundary. But the words around underscores are ranked lower and appear later in the result than the other words around the other types of word boundaries.

1. xxx foo xxx (highest score)
2. xxx foo_xxx
3. xxx_foo xxx
4. xxx_foo_xxx (lowest score)

Negation

If a term is prefixed by !, fzf will exclude the lines that satisfy the term from the result. In this case, fzf performs exact match by default.

Exact-match by default

If you don't prefer fuzzy matching and do not wish to "quote" (prefixing with ') every word, start fzf with -e or --exact option. Note that when --exact is set, '-prefix "unquotes" the term.

OR operator

A single bar character term acts as an OR operator. For example, the following query matches entries that start with core and end with either go, rb, or py.

e.g. ^core go$ | rb$ | py$

AVAILABLE KEYS: (SYNONYMS)

ctrl-[a-z]
ctrl-space
ctrl-delete
ctrl-\
ctrl-]
ctrl-^ (ctrl-6)
ctrl-/ (ctrl-_)
ctrl-alt-[a-z]
alt-[*] (Any case-sensitive single character is allowed)
f[1-12]
enter (return ctrl-m)
space
backspace (bspace bs)
alt-up
alt-down
alt-left
alt-right
alt-enter
alt-space
alt-backspace (alt-bspace alt-bs)
tab
shift-tab (btab)
esc
delete (del)
up
down
left
right
home
end
insert
page-up (pgup)
page-down (pgdn)
shift-up
shift-down
shift-left
shift-right
shift-delete
alt-shift-up
alt-shift-down
alt-shift-left
alt-shift-right
left-click
right-click
double-click
scroll-up
scroll-down
preview-scroll-up
preview-scroll-down
shift-left-click
shift-right-click
shift-scroll-up
shift-scroll-down
or any single character

AVAILABLE EVENTS:

start

load

resize

result

one

zero

backward-eof

jump

jump-cancel

click-header

AVAILABLE ACTIONS:

A key or an event can be bound to one or more of the following actions.

ACTION: DEFAULT BINDINGS (NOTES):
abort ctrl-c ctrl-g ctrl-q esc
accept enter double-click
accept-non-empty (same as accept except that it prevents fzf from exiting without selection)
accept-or-print-query (same as accept except that it prints the query when there's no match)
backward-char ctrl-b left
backward-delete-char ctrl-h bspace
backward-delete-char/eof (same as backward-delete-char except aborts fzf if query is empty)
backward-kill-word alt-bs
backward-word alt-b shift-left
become(...) (replace fzf process with the specified command; see below for the details)
beginning-of-line ctrl-a home
cancel (clear query string if not empty, abort fzf otherwise)
change-border-label(...) (change --border-label to the given string)
change-header(...) (change header to the given string; doesn't affect --header-lines)
change-multi (enable multi-select mode with no limit)
change-multi(...) (enable multi-select mode with a limit or disable it with 0)
change-preview(...) (change --preview option)
change-preview-label(...) (change --preview-label to the given string)
change-preview-window(...) (change --preview-window option; rotate through the multiple option sets separated by '|')
change-prompt(...) (change prompt to the given string)
change-query(...) (change query string to the given string)
clear-screen ctrl-l
clear-selection (clear multi-selection)
close (close preview window if open, abort fzf otherwise)
clear-query (clear query string)
delete-char del
delete-char/eof ctrl-d (same as delete-char except aborts fzf if query is empty)
deselect
deselect-all (deselect all matches)
disable-search (disable search functionality)
down ctrl-j ctrl-n down
enable-search (enable search functionality)
end-of-line ctrl-e end
execute(...) (see below for the details)
execute-silent(...) (see below for the details)
first (move to the first match; same as pos(1))
forward-char ctrl-f right
forward-word alt-f shift-right
ignore
jump (EasyMotion-like 2-keystroke movement)
kill-line
kill-word alt-d
last (move to the last match; same as pos(-1))
next-history (ctrl-n on --history)
next-selected (move to the next selected item)
page-down pgdn
page-up pgup
half-page-down
half-page-up
hide-header
hide-preview
offset-down (similar to CTRL-E of Vim)
offset-up (similar to CTRL-Y of Vim)
offset-middle (place the current item is in the middle of the screen)
pos(...) (move cursor to the numeric position; negative number to count from the end)
prev-history (ctrl-p on --history)
prev-selected (move to the previous selected item)
preview(...) (see below for the details)
preview-down shift-down
preview-up shift-up
preview-page-down
preview-page-up
preview-half-page-down
preview-half-page-up
preview-bottom
preview-top
print(...) (add string to the output queue and print on exit)
put (put the character to the prompt)
put(...) (put the given string to the prompt)
refresh-preview
rebind(...) (rebind bindings after unbind)
reload(...) (see below for the details)
reload-sync(...) (see below for the details)
replace-query (replace query string with the current selection)
select
select-all (select all matches)
show-header
show-preview
toggle (right-click)
toggle-all (toggle all matches)
toggle+down ctrl-i (tab)
toggle-header
toggle-in (--layout=reverse* ? toggle+up : toggle+down)
toggle-out (--layout=reverse* ? toggle+down : toggle+up)
toggle-preview
toggle-preview-wrap
toggle-search (toggle search functionality)
toggle-sort
toggle-track (toggle global tracking option (--track))
toggle-track-current (toggle tracking of the current item)
toggle-wrap ctrl-/ alt-/
toggle+up btab (shift-tab)
track-current (track the current item; automatically disabled if focus changes)
transform(...) (transform states using the output of an external command)
transform-border-label(...) (transform border label using an external command)
transform-header(...) (transform header using an external command)
transform-preview-label(...) (transform preview label using an external command)
transform-prompt(...) (transform prompt string using an external command)
transform-query(...) (transform query string using an external command)
unbind(...) (unbind bindings)
unix-line-discard ctrl-u
unix-word-rubout ctrl-w
untrack-current (stop tracking the current item; no-op if global tracking is enabled)
up ctrl-k ctrl-p up
yank ctrl-y

ACTION COMPOSITION

Multiple actions can be chained using + separator.

e.g.
fzf --multi --bind 'ctrl-a:select-all+accept'
fzf --multi --bind 'ctrl-a:select-all' --bind 'ctrl-a:+accept'

ACTION ARGUMENT

An action denoted with (...) suffix takes an argument.

e.g.
fzf --bind 'ctrl-a:change-prompt(NewPrompt> )'
fzf --bind 'ctrl-v:preview(cat {})' --preview-window hidden

If the argument contains parentheses, fzf may fail to parse the expression. In that case, you can use any of the following alternative notations to avoid parse errors.

action-name[...]
action-name{...}
action-name<...>
action-name~...~
action-name!...!
action-name@...@
action-name#...#
action-name$...$
action-name%...%
action-name^...^
action-name&...&
action-name*...*
action-name;...;
action-name/.../
action-name|...|
action-name:...

COMMAND EXECUTION

With execute(...) action, you can execute arbitrary commands without leaving fzf. For example, you can turn fzf into a simple file browser by binding enter key to less command like follows.

fzf --bind "enter:execute(less {})"

You can use the same placeholder expressions as in --preview.

fzf switches to the alternate screen when executing a command. However, if the command is expected to complete quickly, and you are not interested in its output, you might want to use execute-silent instead, which silently executes the command without the switching. Note that fzf will not be responsive until the command is complete. For asynchronous execution, start your command as a background process (i.e. appending &).

On *nix systems, fzf runs the command with $SHELL -c if SHELL is set, otherwise with sh -c, so in this case make sure that the command is POSIX-compliant.

become(...) action is similar to execute(...), but it replaces the current fzf process with the specified command using execve(2) system call.

fzf --bind "enter:become(vim {})"

RELOAD INPUT

reload(...) action is used to dynamically update the input list without restarting fzf. It takes the same command template with placeholder expressions as execute(...).

See https://github.com/junegunn/fzf/issues/1750 for more info.

e.g.
# Update the list of processes by pressing CTRL-R
ps -ef | fzf --bind 'ctrl-r:reload(ps -ef)' --header 'Press CTRL-R to reload' \
--header-lines=1 --layout=reverse

# Integration with ripgrep
RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
INITIAL_QUERY="foobar"
FZF_DEFAULT_COMMAND="$RG_PREFIX '$INITIAL_QUERY'" \
fzf --bind "change:reload:$RG_PREFIX {q} || true" \
--ansi --disabled --query "$INITIAL_QUERY"

reload-sync(...) is a synchronous version of reload that replaces the list only when the command is complete. This is useful when the command takes a while to produce the initial output and you don't want fzf to run against an empty list while the command is running.

e.g.
# You can still filter and select entries from the initial list for 3 seconds
seq 100 | fzf --bind 'load:reload-sync(sleep 3; seq 1000)+unbind(load)'

TRANSFORM ACTIONS

Actions with transform- prefix are used to transform the states of fzf using the output of an external command. The output of these commands are expected to be a single line of text.

e.g.
fzf --bind 'focus:transform-header:file --brief {}'

transform(...) action runs an external command that should print a series of actions to be performed. The output should be in the same format as the payload of HTTP POST request to the --listen server.

e.g.
# Disallow selecting an empty line
echo -e "1. Hello\n2. Goodbye\n\n3. Exit" |
fzf --height '~100%' --reverse --header 'Select one' \
--bind 'enter:transform:[[ -n {} ]] &&
echo accept ||
echo "change-header:Invalid selection"'

PREVIEW BINDING

With preview(...) action, you can specify multiple different preview commands in addition to the default preview command given by --preview option.

e.g.
# Default preview command with an extra preview binding
fzf --preview 'file {}' --bind '?:preview:cat {}'

# A preview binding with no default preview command
# (Preview window is initially empty)
fzf --bind '?:preview:cat {}'

# Preview window hidden by default, it appears when you first hit '?'
fzf --bind '?:preview:cat {}' --preview-window hidden

CHANGE PREVIEW WINDOW ATTRIBUTES

change-preview-window action can be used to change the properties of the preview window. Unlike the --preview-window option, you can specify multiple sets of options separated by '|' characters.

e.g.
# Rotate through the options using CTRL-/
fzf --preview 'cat {}' --bind 'ctrl-/:change-preview-window(right,70%|down,40%,border-horizontal|hidden|right)'

# The default properties given by `--preview-window` are inherited, so an empty string in the list is interpreted as the default
fzf --preview 'cat {}' --preview-window 'right,40%,border-left' --bind 'ctrl-/:change-preview-window(70%|down,border-top|hidden|)'

# This is equivalent to toggle-preview action
fzf --preview 'cat {}' --bind 'ctrl-/:change-preview-window(hidden|)'