Update README examples

README.md

@@ -334,13 +334,33 @@ fish.
 - `CTRL-T` - Paste the selected files and directories onto the command-line
     - Set `FZF_CTRL_T_COMMAND` to override the default command
     - Set `FZF_CTRL_T_OPTS` to pass additional options to fzf
+      ```sh
+      # Preview file content using bat (https://github.com/sharkdp/fd)
+      export FZF_CTRL_T_OPTS="
+        --preview 'bat -n --color=always {}'
+        --bind 'ctrl-/:change-preview-window(down|hidden|)'"
+      ```
 - `CTRL-R` - Paste the selected command from history onto the command-line
     - If you want to see the commands in chronological order, press `CTRL-R`
       again which toggles sorting by relevance
     - Set `FZF_CTRL_R_OPTS` to pass additional options to fzf
+      ```sh
+      # CTRL-/ to toggle small preview window to see the full command
+      # CTRL-Y to copy the command into clipboard using pbcopy
+      export FZF_CTRL_R_OPTS="
+        --preview 'echo {}' --preview-window up:3:hidden:wrap
+        --bind 'ctrl-/:toggle-preview'
+        --bind 'ctrl-y:execute-silent(echo -n {2..} | pbcopy)+abort'
+        --color header:italic
+        --header 'Press CTRL-Y to copy command into clipboard'"
+      ```
 - `ALT-C` - cd into the selected directory
     - Set `FZF_ALT_C_COMMAND` to override the default command
     - Set `FZF_ALT_C_OPTS` to pass additional options to fzf
+      ```sh
+      # Print tree structure in the preview window
+      export FZF_ALT_C_OPTS="--preview 'tree -C {}'"
+      ```
 
 If you're on a tmux session, you can start fzf in a tmux split-pane or in
 a tmux popup window by setting `FZF_TMUX_OPTS` (e.g. `-d 40%`).
@@ -429,7 +449,7 @@ _fzf_compgen_dir() {
   fd --type d --hidden --follow --exclude ".git" . "$1"
 }
 
-# (EXPERIMENTAL) Advanced customization of fzf options via _fzf_comprun function
+# Advanced customization of fzf options via _fzf_comprun function
 # - The first argument to the function is the name of the command.
 # - You should make sure to pass the rest of the arguments to fzf.
 _fzf_comprun() {
@@ -437,10 +457,10 @@ _fzf_comprun() {
   shift
 
   case "$command" in
-    cd)           fzf "$@" --preview 'tree -C {} | head -200' ;;
+    cd)           fzf --preview 'tree -C {} | head -200'   "$@" ;;
-    export|unset) fzf "$@" --preview "eval 'echo \$'{}" ;;
+    export|unset) fzf --preview "eval 'echo \$'{}"         "$@" ;;
-    ssh)          fzf "$@" --preview 'dig {}' ;;
+    ssh)          fzf --preview 'dig {}'                   "$@" ;;
-    *)            fzf "$@" ;;
+    *)            fzf --preview 'bat -n --color=always {}' "$@" ;;
   esac
 }
 ```
@@ -517,9 +537,8 @@ Advanced topics
 
 ### Performance
 
-fzf is fast and is [getting even faster][perf]. Performance should not be
+fzf is fast. Performance should not be a problem in most use cases. However,
-a problem in most use cases. However, you might want to be aware of the
+you might want to be aware of the options that can affect performance.
-options that affect performance.
 
 - `--ansi` tells fzf to extract and parse ANSI color codes in the input, and it
   makes the initial scanning slower. So it's not recommended that you add it
@@ -527,12 +546,6 @@ options that affect performance.
 - `--nth` makes fzf slower because it has to tokenize each line.
 - `--with-nth` makes fzf slower as fzf has to tokenize and reassemble each
   line.
-- If you absolutely need better performance, you can consider using
-  `--algo=v1` (the default being `v2`) to make fzf use a faster greedy
-  algorithm. However, this algorithm is not guaranteed to find the optimal
-  ordering of the matches and is not recommended.
-
-[perf]: https://junegunn.kr/images/fzf-0.17.0.png
 
 ### Executing external programs
 
@@ -612,7 +625,7 @@ syntax-highlights the content of a file, such as
 [Highlight](http://www.andre-simon.de/doku/highlight/en/highlight.php):
 
 ```bash
-fzf --preview 'bat --style=numbers --color=always --line-range :500 {}'
+fzf --preview 'bat --color=always {}' --preview-window '~3'
 ```
 
 You can customize the size, position, and border of the preview window using
@@ -622,6 +635,7 @@ You can customize the size, position, and border of the preview window using
 ```bash
 fzf --height 40% --layout reverse --info inline --border \
     --preview 'file {}' --preview-window up,1,border-horizontal \
+    --bind 'ctrl-/:change-preview-window(50%|hidden|)' \
     --color 'fg:#bbccdd,fg+:#ddeeff,bg:#334455,preview-bg:#223344,border:#778899'
 ```