My tmux configurations

.tmux.conf

# 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 -
bind \ split-window -h
bind - split-window -v
unbind '"'
unbind %

# switch panes using Alt-arrow without prefix
bind -n M-Left select-pane -L
bind -n M-Right select-pane -R
bind -n M-Up select-pane -U
bind -n M-Down select-pane -D

# Enable mouse control (clickable windows, panes, resizable panes)
# set -g mouse-select-window on
# set -g mouse-select-pane on
# set -g mouse-resize-pane on
#set-option -g mouse on

set-option -g repeat-time 0

# Remove the confirmation when killing a pane
bind-key x kill-pane

# Nested Tmux config
set -g status-bg green
setw -g window-status-current-style bg=black,fg=white
setw -g window-status-current-format ' #I:#W#F '

bind -n C-t new-window -a
bind -n S-left  prev
bind -n S-right next
bind -n S-C-left  swap-window -t -1
bind -n S-C-right swap-window -t +1

bind -n M-F11 set -qg status-bg colour245
bind -n M-F12 set -qg status-bg colour186
bind -n S-up \
    send-keys M-F12 \; \
    set -qg status-bg colour245 \; \
    unbind -n S-left \; \
    unbind -n S-right \; \
    unbind -n S-C-left \; \
    unbind -n S-C-right \; \
    unbind -n C-t \; \
    set -qg prefix C-b
bind -n S-down \
    send-keys M-F11 \; \
    set -qg status-bg colour186 \; \
    bind -n S-left  prev \; \
    bind -n S-right next \; \
    bind -n S-C-left swap-window -t -1 \; \
    bind -n S-C-right swap-window -t +1 \; \
    bind -n C-t new-window -a -c "#{pane_current_path}" \; \
    set -qg prefix C-a