Speedlite flash: exposure compensation

When shooting with flash, it is possible to set flash exposure compensation on both the camera and the flashgun. If you set the compensation on just the Speedlite, then you will find you cannot adjust it from the camera. If you manage to set flash exposure compensation on both the camera and the flash, then the setting on the Speedlite will override the one on the camera.
Keywords:
EX Speedlites
Flash
Workflow