How do you force the 7D to use flash?
I've flipped through the manual, checked the menu, and I just can't figure it out. The 7D seems to prefer long exposures to firing the flash. I tried on full auto and aperture priority this evening and on both settings I was getting around 1/10 sec. shutter speeds, but no flash. The one time to flash did fire, the picture was overexposed.
Is there a way to force the flash (either built-in or external) to fire, regardless of any other setting or environmental condition? Flipping up the flash seems like a mere suggestion to which the 7D does not listen.