In addition to extra tappable keys, Extra Keys also allows for different outcomes when the user does swipe-up on a key, including the outputting of key sequences, which can include modifier keys like CTRL . extra-keys = [[ \ { key: 'ESC' , popup: { macro: "CTRL x 1" , display: "C-x 1" }} , \ { key: 'CTRL' , popup: { macro: "CTRL c" , display: "C-c" }} , \ { key: 'ALT' , popup: { macro: "ALT x" , display: "M-x" }} , \ { key: '♡' , popup: { macro: "CTRL x r b" , display: "bookmarks" }} , \ { key: '~' , popup: { macro: "CTRL c n d" , display: "today" }} , \ { key: 'UP' , popup: { macro: "CTRL c n n" , display: "new note" }} , \ { key: '-' , popup: { macro: "CTRL c CTRL k" , display: "cancel note" }} , \ { key: 'PGUP' , popup: { macro: "CTRL c n y" , display: "prev note" }}] , \ [ \ { key:…