unbind C-b
set -g prefix C-o

bind-key \ split-window -h
bind-key - split-window

set -g history-limit 40000
setw -g mode-mouse on

set-option -g mouse-select-pane on
set -g default-terminal "screen-256color"

set-option -g default-shell /bin/zsh

bind-key -r < resize-pane -L 3
bind-key -r > resize-pane -R 3
bind-key -r + resize-pane -U 3
bind-key -r = resize-pane -D 3