diff --git a/sh/tmux.sh b/sh/tmux.sh
index 25deab9..a95def1 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -6,34 +6,45 @@ rwx_tmux_setup() {
 	local file
 	file="${HOME}/.tmux.conf"
 	rwx_file_write "${file}" "\
-# first index number
-set-option -g base-index 1
-set-option -g pane-base-index 1
-# display duration
-set-option -g display-time 1536
-# reload configuration
-bind-key r source-file ${file} \\; display-message 'Source: ${file}'
-# toggle mouse
-bind-key t set-option -g mouse \\; display-message 'Mouse: #{mouse}'
-
-# select sessions with Alt & ↑ | ↓
-bind-key -n M-Down switch-client -n
-bind-key -n M-Up switch-client -p
+# ╭────────╮
+# │ option │
+# ╰────────╯
 
 # empty name for windows
-set-option -g automatic-rename on
 set-option -g automatic-rename-format '#{pane_current_command}'
+set-option -g automatic-rename on
+
+# first index number
+set-option -g base-index 1
+
+# display duration
+set-option -g display-time 1536
+
 # extend history limit
 set-option -g history-limit 1048576
+
+# style for messages
+set-option -g message-style bg=red,fg=white
+
+# activity monitoring
+set-window-option -g monitor-activity on
+
+# silence monitoring
+set-window-option -g monitor-silence 0
+
 # enable mouse actions
 set-option -g mouse on
+
+# prefix with ^B or F12
+set-option -g prefix C-b
+set-option -g prefix2 F12
+
 # renumber windows after closing one
 set-option -g renumber-windows on
-# status lines
-set-option -g status 3
 
 # enable title
 set-option -g set-titles on
+
 # set title to working directory
 set-option -g set-titles-string '\
 tmux / \
@@ -42,9 +53,37 @@ tmux / \
 #{pane_index} #{pane_width}×#{pane_height}\
 '
 
-# status bar
+# status lines
+set-option -g status 3
+
+# ╭────────┬──────╮
+# │ option │ pane │
+# ╰────────┴──────╯
+
+# first index number
+set-option -g pane-base-index 1
+
+# ╭────────┬──────┬────────╮
+# │ option │ pane │ border │
+# ╰────────┴──────┴────────╯
+
+# active style
+set-option -g pane-active-border-style bg=black,fg=green
+
+# regular style
+set-option -g pane-border-style bg=black,fg=gray
+
+# ╭────────┬────────╮
+# │ option │ status │
+# ╰────────┴────────╯
+
+# background color
 set-option -g status-bg black
+
+# foreground color
 set-option -g status-fg gray
+
+# first line
 set-option -g status-format[0] '\
 #{W:\
 #{?window_active,#[fg=green],\
@@ -59,6 +98,8 @@ set-option -g status-format[0] '\
 #[align=right] \
 #[fg=yellow]%Y-%m-%d\
 '
+
+# second line
 set-option -g status-format[1] '\
 #{P:\
 #{?pane_active,#[fg=green],#[fg=default]}\
@@ -70,26 +111,38 @@ set-option -g status-format[1] '\
 #[align=right] \
 #[fg=yellow]%H:%M:%S\
 '
+
+# third line
 set-option -g status-format[2] '\
 #[fg=cyan]#{pane_current_path}\
 '
+
+# refresh period
 set-option -g status-interval 1
+
+# bar location
 set-option -g status-position top
 
-# style for messages
-set-option -g message-style bg=red,fg=white
-# style for pane borders
-set-option -g pane-active-border-style bg=black,fg=green
-set-option -g pane-border-style bg=black,fg=gray
+# ╭─────╮
+# │ key │
+# ╰─────╯
 
-# prefix with ^B or F12
-set-option -g prefix C-b
-set-option -g prefix2 F12
+# select sessions with Alt & ↑ | ↓
+bind-key -n M-Down switch-client -n
+bind-key -n M-Up switch-client -p
 
-# enable activity monitoring
-set-window-option -g monitor-activity on
-# disable silence monitoring
-set-window-option -g monitor-silence 0
+# ╭─────┬────────╮
+# │ key │ prefix │
+# ╰─────┴────────╯
+
+# reload configuration
+bind-key r source-file ${file} \\; display-message 'source-file ${file}'
+
+# toggle mouse
+bind-key t set-option -g mouse \\; display-message 'mouse = #{mouse}'
+
+# ╭─╮
+# ╰─╯
 
 # bind key to detach client
 bind-key -n F6 detach-client