vim ~/.config/zellij/config.kd

or

vim ~/.config/zellij/config.yaml

// Choose what to do when zellij receives SIGTERM, SIGINT, SIGQUIT or SIGHUP
// eg. when terminal window with an active zellij session is closed
// Options:
//   - detach (Default)
//   - quit
//
on_force_close "detach"

// Send a request for a simplified ui (without arrow fonts) to plugins
// Options:
//   - true
//   - false (Default)
//
simplified_ui true

// Choose the path to the default shell that zellij will use for opening new panes
// Default: $SHELL
//
default_shell "bash"

// Toggle between having pane frames around the panes
// Options:
//   - true (default)
//   - false
//
pane_frames false

// Choose the theme that is specified in the themes section.
// Default: default
//
theme "default" 

// The name of the default layout to load on startup
// Default: "default"
//
// default_layout "compact"

// Choose the mode that zellij uses when starting up.
// Default: normal
//
default_mode "normal"

// Toggle enabling the mouse mode.
// On certain configurations, or terminals this could
// potentially interfere with copying text.
// Options:
//   - true (default)
//   - false
//
mouse_mode true

// Configure the scroll back buffer size
// This is the number of lines zellij stores for each pane in the scroll back
// buffer. Excess number of lines are discarded in a FIFO fashion.
// Valid values: positive integers
// Default value: 10000
//
scroll_buffer_size 10000

// Provide a command to execute when copying text. The text will be piped to
// the stdin of the program to perform the copy. This can be used with
// terminal emulators which do not support the OSC 52 ANSI control sequence
// that will be used by default if this option is not set.
// Examples:
//
copy_command "xclip -selection clipboard" // x11
// copy_command "wl-copy"                    // wayland
// copy_command "pbcopy"                     // osx

// Choose the destination for copied text
// Allows using the primary selection buffer (on x11/wayland) instead of the system clipboard.
// Does not apply when using copy_command.
// Options:
//   - system (default)
//   - primary
//
// copy_clipboard "primary"

// Enable or disable automatic copy (and clear) of selection when releasing mouse
// Default: true
//
// copy_on_select false

// Path to the default editor to use to edit pane scrollbuffer
// Default: $EDITOR or $VISUAL
//
scrollback_editor "/usr/bin/vim"

// When attaching to an existing session with other users,
// should the session be mirrored (true)
// or should each user have their own cursor (false)
// Default: false
//
// mirror_session true
keybinds {
    normal {
        bind "Ctrl k" {DumpScreen "~/screen.log"; }
        // keybindings available in normal mode
    }
    pane {
        // keybindings available in pane mode
    }
}
// The folder in which Zellij will look for layouts
//
// layout_dir /path/to/my/layout_dir

// The folder in which Zellij will look for themes
//
// theme_dir "/path/to/my/theme_dir"