kitten-@-set-background-opacity(1) kitten Manual (NAME) kitten-@-set-background-opacity - kitty (SYNOPSIS) kitten @ set-background-opacity OPACITY (DESCRIPTION) . dynamic_background_opacity kitty.conf . kitty . : kitten @ set-background-opacity 0.5 (OPTIONS) --all, -a [=no] . . --toggle [=no] . --match, -m . field:query field : id title pid cwd cmdline num env var state neighbor session recent. query . (Regex) . all . : id pid num recent . id -1 . num ( kitten @ ls ). KITTY_WINDOW_ID . recent . neighbor : left right top bottom. session . ^$ . ~ ( ) . env env:MY_ENV_VAR=2. var . env . state . : active focused needs_attention parent_active parent_focused focused_os_window self overlay_parent. active . focused . . focused_os_window . self . overlay_parent self ( self overlay ) . kitten @ ls . --match-tab, -t . field:query field : id index title window_id window_title pid cwd cmdline env var state session recent. query . (Regex) . all . : id index window_id pid recent . id/window_id -1 / . title id . window_id window_title . index n- . recent . session . ^$ . ~ ( ) . env env:MY_ENV_VAR=2. . var . state . : active focused needs_attention parent_active parent_focused focused_os_window. active . focused . . focused_os_window . kitten @ ls . --help, -h [=no] (GLOBAL OPTIONS) --to kitty . kitty --listen-on listen_on kitty.conf . KITTY_LISTEN_ON . kitty . --password kitty. kitty kitty.conf . --use-password always . --password-file [=rc-pass] . . kitty . - (STDIN) . fd:num num . --password . rc-pass kitty . --password-env [=KITTY_RC_PASSWORD] . --password-file . KITTY_RC_PASSWORD . --use-password [=if-available] kitty . . always . : if-available, always, never 0.48.2 July 30, 2026 kitten-@-set-background-opacity(1)