My tmux configuration

.tmux.conf

set -g default-terminal "screen-256color"

# mouse support
set-option -g mouse on

# force a reload of the config file
unbind r
bind r source-file ~/.tmux.conf

# remap prefix to Control + a
set -g prefix C-a
unbind C-b
bind C-a send-prefix

# Splitting
unbind %
unbind '"'
bind v split-window -v -c "#{pane_current_path}"
bind h split-window -h -c "#{pane_current_path}"

# Copy and Paste
setw -g mode-keys vi
bind-key -T copy-mode-vi v send-keys -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-pipe-and-cancel "reattach-to-user-namespace pbcopy"
bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel "reattach-to-user-namespace pbcopy"
set -g default-command 'reattach-to-user-namespace $SHELL --login'