.tmux.conf

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

# Note: C-Tab may not work in all terminals as many capture it for tab switching
# If C-Tab doesn't work, consider using C-a or C-s instead

# split panes using prefix + v (vertical) and prefix + h (horizontal)
bind v split-window -h
bind h split-window -v
unbind '"'
unbind %

# reload config file (change file location to your the tmux.conf you want to use)
bind r source-file ~/.tmux.conf

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

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

# don't rename windows automatically
set-option -g allow-rename off

set -g set-clipboard on

# Cross-platform clipboard: pbcopy (macOS), wl-copy (Wayland), xclip (X11)
if-shell "uname | grep -q Darwin" {
    set -s copy-command 'pbcopy'
    bind -T copy-mode MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'pbcopy'
    bind -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'pbcopy'
} {
    if-shell "command -v wl-copy" {
        set -s copy-command 'wl-copy'
        bind -T copy-mode MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'wl-copy'
        bind -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'wl-copy'
    } {
        set -s copy-command 'xclip -selection clipboard'
        bind -T copy-mode MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'xclip -selection clipboard'
        bind -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'xclip -selection clipboard'
    }
}