Send key combination

Send a key combination in XDO-style syntax (e.g., 'ctrl+a', 'alt+tab').

Join keys with + to press them together as one chord (e.g. ctrl+a); a chord may combine multiple modifiers (ctrl/alt/shift/win) but only one non-modifier key. Separate keys with spaces to press them one after another (e.g. down down down). Using + between repeated or multiple non-modifier keys (e.g. down+down+down) is invalid — use spaces instead (down down down).

When down is omitted, the key is pressed and released normally. Pass down=true to press and hold the key (without releasing), and down=false to release a key that was previously held.