 The most important addition is the ability to input and display lower-case letters.Other keyboard improvements include four-way cursor control and standard editing keys (Delete and Tab), two special Apple modifier keys (Open and Solid Apple), and a safe off-to-side relocation of the "Reset" key.The auto-repeat function (any key held down to repeat same character continuously) is now automatic, no longer requiring the "REPT" key found on the keyboards of previous models.