diff --git a/.tmux.conf b/.tmux.conf
index 2916756..fd174b7 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -1,58 +1,96 @@
 
-# reload config file (change file location to your the tmux.conf you want to use)
-bind r source-file ~/.tmux.conf
+#################################################
+# CONFIG
+#################################################
 
-# Very short Escape key delay, to allow using modal editors.
-set -sg escape-time 20
-
-# Fix colors in text editors
+# Fix colors in ANSI-based text editors.
 set -g default-terminal "tmux-256color"
 set -ga terminal-overrides ",*col*:Tc"
 
-set -g status-position top
-
 # Update the status bar every seconds (for the clock).
 set -g status-interval 1
 
 # Enable mouse control (clickable windows, panes, resizable panes)
 set -g mouse on
 
-# remap prefix from 'C-b' to 'C-a'
+
+#################################################
+# SHORTCUTS
+#################################################
+
+# Very short Escape key delay, to allow using modal editors.
+set -sg escape-time 20
+
+# Remap prefix from 'C-b' to 'C-a'.
 unbind C-b
 set-option -g prefix C-a
 bind-key C-a send-prefix
 
-# split panes using | and -
+# Split panes.
 bind s split-window -h
 bind S split-window -v
 unbind '"'
 unbind %
 
+# Windows switching.
 bind Tab next-window
 bind S-Tab previous-window
 bind C-a last-window
 
+# Reload config file.
+# NOTE: change file location to your the tmux.conf you want to use.
+bind r source-file ~/.tmux.conf
 
+
+#################################################
+# THEME
+#################################################
+
+# Design rationale:
+# - Basics: visible windows tabs, active one highlighted.
+# - This follows the look-n-feel of my generic theming (vim, kakoune, liquidprompt, etc.).
+# - Blue is "insert mode", i.e. what you type is typed.
+# - Yellow is "normal mode", i.e. the item is a (potential) target for a command.
+# - When entering prefix, the active window tab is in yellow.
+# - Tabs structure: <window number>(<activity marker><number of panes>)<window position> <window name>
+#     - the activity marker is a ‼ if there is a bell alert, a ! if there is a silent notification, a ∘ else.
+#     - the window position is a dark ⁚ for the active window, a ⁝ for the last window and a light ⁚ for others.
+# - When entering prefix, a yellow [A] is displayed and the active window tab is yellow, drawing attention to what you are doing next.
+
+# Just like a normal window title bar.
+set -g status-position top
+
+# Thick blue border.
 set -g pane-active-border-style bg='#6f9dfe',fg='#6f9dfe'
 
+# Default status style.
 set -g status-style bg='#3f6dce',fg='#d3d0cc'
 
+# tmux-mode-indicator (mainly displays TMUX or WAIT), then prefix marker.
 set -g status-left '#{tmux_mode_indicator}#[bg=#3f6dce]#[fg=#d3d0cc]#{?client_prefix,#[bg=#cf8200]#[fg=#f8f8f8][A],[ ]}#[bg=#3f6dce]##[fg=#2f5dbe]║'
 
-
-set-window-option -g window-status-format "#[bg=#4f7dde,noreverse,bold] #[fg=#cf8200]#I#[fg=#2f5dbe,none](#[fg=#d3d0cc]#{?window_bell_flag,#[bg=#ffcc00]#[fg=#db4939]‼,#{?window_silence_flag,#[bg=#ffcc00]#[fg=#db4939]!,#[fg=#2f5dbe]∘}}#[bg=#4f7dde]#[fg=#d3d0cc]#{window_panes}#[fg=#2f5dbe])#[fg=#d3d0cc]#{last_window}#{?window_last_flag,⁝,⁚} #[fg=#d3d0cc,bold]#W #[fg=#d3d0cc,none]"
-
+# Active window tab.
 set-window-option -g window-status-current-format "#{?client_prefix,#[bg=#cf8200],#[bg=#6f9dfe]}#[fg=#ffcc00,bold]❰#[fg=#ffcc00]#I#[fg=#2f5dbe,none](∘#{?client_prefix,#[bg=#cf8200],#[bg=#6f9dfe]}#[fg=#f8f8f8]#{window_panes}#{?client_prefix,#[bg=#cf8200],#[bg=#6f9dfe]}#[fg=#2f5dbe])⁚ #[fg=#ffffff,bold]#W#[fg=#f8f8f8,none]#[fg=#ffcc00,bold]❱"
 
+# Other windows tabs.
+set-window-option -g window-status-format "#[bg=#4f7dde,noreverse,bold] #[fg=#cf8200]#I#[fg=#2f5dbe,none](#[fg=#d3d0cc]#{?window_bell_flag,#[bg=#ffcc00]#[fg=#db4939]‼,#{?window_silence_flag,#[bg=#ffcc00]#[fg=#db4939]!,#[fg=#2f5dbe]∘}}#[bg=#4f7dde]#[fg=#d3d0cc]#{window_panes}#[fg=#2f5dbe])#[fg=#d3d0cc]#{last_window}#{?window_last_flag,⁝,⁚} #[fg=#d3d0cc,bold]#W #[fg=#d3d0cc,none]"
+
+# Tabs separator.
 set-window-option -g window-status-separator "#[fg=#2f5dbe]║" #⟭⟬"
 
+# No reverse on notifications.
 set-window-option -g window-status-activity-style none
 
-# tmux-window-name config
-# Shell programs, will show dir instead of the program
-# set -g @tmux_window_name_shells "['zsh', 'bash', 'sh']"
-# Programs that will show the dir name along with the program name.
-# set -g @tmux_window_dir_programs "['kak', 'less', 'nvim', 'vim', 'vi', 'git']"
+# Larger right status section.
+set -g status-right-length 50
+
+# download session@host date(week) hour
+set -g status-right '↓#{download_speed}#[fg=#2f5dbe]║#[fg=#ffcc00]#S#[fg=#ffffff]@#[fg=#d3d0cc]#h#[fg=#2f5dbe]║#[fg=#d3d0cc]%Y-%m-%d#[fg=#9390bd](#[fg=#d3d0cc]%W#[fg=#9390bd])#[fg=#2f5dbe]║#[fg=#d3d0cc]%H:%M#[fg=#2f5dbe]'
+
+
+#################################################
+# PLUGINS
+#################################################
 
 # Plugins
 # C-a I to install.
@@ -66,10 +104,11 @@ set -g @plugin 'tmux-plugins/tmux-net-speed'
 set -g @plugin 'MunifTanjim/tmux-mode-indicator'
 # set -g @plugin 'ofirgall/tmux-window-name'
 
-# set -g status-right '[#(tmux-mem-cpu-load --colors --graph-lines 10 --interval 2)] ~#{net_speed}~ _#{keyboard_layout}_ %H:%M:%S %Y-%m-%d(%W)'
-set -g status-right-length 50
-set -g status-right '↓#{download_speed}#[fg=#2f5dbe]║#[fg=#ffcc00]#S#[fg=#ffffff]@#[fg=#d3d0cc]#h#[fg=#2f5dbe]║#[fg=#d3d0cc]%Y-%m-%d#[fg=#9390bd](#[fg=#d3d0cc]%W#[fg=#9390bd])#[fg=#2f5dbe]║#[fg=#d3d0cc]%H:%M#[fg=#2f5dbe]'
+# tmux-window-name config
+# Shell programs, will show dir instead of the program
+# set -g @tmux_window_name_shells "['zsh', 'bash', 'sh']"
+# Programs that will show the dir name along with the program name.
+# set -g @tmux_window_dir_programs "['kak', 'less', 'nvim', 'vim', 'vi', 'git']"
 
 # Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)
 run '~/.tmux/plugins/tpm/tpm'
-