tmux.config

set -g mouse on
set -g prefix C-s
unbind r 
bind r source-file ~/.tmux.conf 

# Enable RGB (truecolor)
set -a terminal-features '*:RGB'

# Enable clored underlines (e.g. in Vim)
set -a terminal-features '*:usstyle'

set -ga terminal-overrides ",*256col*:Tc"

# fix the cursor shape https://github.com/neovim/neovim/issues/5096#issuecomment-469027417
set -ga terminal-overrides '*:Ss=\E[%p1%d q:Se=\E[ q'
# undercurl support
set -as terminal-overrides ',*:Smulx=\E[4::%p1%dm'
# underscore colours - needs tmux-3.0
set -as terminal-overrides ',*:Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m'

# Use extended keys (CSI u)
set -g extended-keys on
set -g escape-time 10
set -g focus-events on
## update the TERM variable of terminal emulator when creating a new session or attaching a existing session
set -g update-environment 'DISPLAY SSH_ASKPASS SSH_AGENT_PID SSH_CONNECTION WINDOWID XAUTHORITY TERM'
# use vi mode 

setw -g mode-keys vi
bind -T copy-mode-vi v send -X begin-selection
bind -T copy-mode-vi y send-keys -X copy-pipe-and-cancel "pbcopy"
bind P paste-buffer
bind -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel "pbcopy"

bind-key -T copy-mode-vi v send-keys -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-selection-and-cancel

bind-key h select-pane -L
bind-key j select-pane -D
bind-key k select-pane -U
bind-key l select-pane -R