This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
There are a number of ways to set the NTSC //e keyboard to Dvorak. 1- If you have a Rev A motherboard cut X1 and join X2. This will allow AN2 to control the keyboard layout (default will be Dvorak). 2- If you have a Rev B motherboard and want AN2 to control the keyboard layout cut X2 and solder a short wire between the back half of X2 and the back half of X3 (do not join X3). 3- Obtain a 24 pin IC socket. Solder 3 fine wires to pins 12, 19 and 24. Solder the other ends to a SPDT switch (pin 19 to the centre/common terminal). Remove the keyboard ROM, insert the switch+socket and then insert the keyboard ROM. Cut X1 (if Rev A) or X2 (if Rev B) to isolate pin 19. Mount the switch somewhere convenient. All the above was taken from "Understanding the Apple IIe" by Jim Sather. I recommend it to you. By: David E A Wilson By: Bradley P. Von Haden, Supertimer, Chippy