My tmux config

.tmux.conf

# Rebind prefix to Ctrl-A
set -g prefix C-a
unbind C-b
bind C-a send-prefix

# Bind "r" for reloading configuration
bind r source-file ~/.tmux.conf \; display "Configuration reloaded!"

# Bind "|" for splitting the current window vertically, and "-" for horizontally
unbind %
bind | split-window -h
bind - split-window -v

# Display things in 256 colors
set -g default-terminal "screen-256color"

# Bind "M" for enabling mouse support
bind M \
    set-option -g mouse on \;\
    display 'Mouse: ON'

# Bind "m" for disabling mouse support
bind m \
    set-option -g mouse off \;\
    display 'Mouse: OFF'
# Note: hold shift key to select the text using mouse

# Set history size
set -g history-limit 10000

# Renumber windows sequentially after closing
set -g renumber-windows on

# Enable window notifications; display activity on other window
setw -g monitor-activity on
set -g visual-activity on

# Set theme
# From: https://github.com/jimeh/tmux-themepack
source-file "${HOME}/.tmux-themepack/powerline/block/cyan.tmuxtheme"