Crossword Puzzle Common Keyboard KeysOnline version Explore essential keys found on most keyboards. by Arnab Biswas 1 Key that exits or cancels an operation. 2 Key used to move focus or insert horizontal spaces. 3 Key that toggles capitalization of letters. 4 Key that causes letters to appear uppercase when held. 5 Key often used with other keys to perform shortcuts. 6 Modifier key used with others to access alternate commands. 7 Key to submit input or start a new line. 8 Key that inserts a blank character between words. 4 8 6 7 2 3