dot_tmux.conf

#  set-option [-aFgopqsuUw] [-t target-pane] option value
#    Set a pane option with -p, a window option with -w, a server option with -s, otherwise a session option.
#    If the option is not a user option, -w or -s may be unnecessary - tmux will infer the type from the option name,
#      assuming -w for pane options.
#    If -g is given, the global session or window option is set.
#
#    -F expands formats in the option value.
#    The -u flag unsets an option, so a session inherits the option from the global options (or with -g, restores a
#      global option to the default).
#    -U unsets an option (like -u) but if the option is a pane option also unsets the option on any panes in the window.
#    'value' depends on the option and may be a number, a string, or a flag (on, off, or omitted to toggle).

# Enable mouse mode (tmux 2.1 and above)
set-option -g mouse on

# Remap prefix from 'C-b' to 'C-a'
unbind-key C-b
set-option -g prefix C-a
bind-key C-a send-prefix

# Rename windows manually with 'C-a ,'
set-option -g allow-rename off
set-option -g automatic-rename off

# Clear a pane with 'C-a k'
bind-key -N "Clear terminal and scrollback" k \
  send-keys C-c \; \
  send-keys " clear && tmux clear-history" \; \
  send-keys Enter

# Set pane divider colours
set-option -g pane-active-border-style bg=default,fg=colour208

# Set status bar colours
set-option -g status-style bg=colour208,fg=colour0

# Explode by default in window/pane chooser bound to 'C-a w'
bind-key w choose-tree -Z

# Append to built-in list of environment variables to keep refreshed
set-option -ga update-environment ' GOROOT'

# Move windows left and right with 'C-a Shift+Left/Right'
bind-key -N "Shift current window to the left" S-Left swap-window -t -1 \; select-window -t -1
bind-key -N "Shift current window to the right" S-Right swap-window -t +1 \; select-window -t +1

# Increase the scrollback buffer size
set-option -g history-limit 100000

# Set up some windows/panes - leave this near the end
set-hook -g after-new-session "source-file $HOME/.config/tmux/new-session.conf"