setw -g mode-keys vi
# 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 3 split-window -h
bind 2 split-window -v
unbind '"'
unbind %
# Enable mouse mode (tmux 2.1 and above)
set -g mouse on


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