When you take a picture using Photo Booth you have a three-second countdown to prepare for your picture. However, it can be found that three seconds is perhaps too long to hold your perfect pose. This is where knowledge about Photo Booth Key bindings can be useful. If you hold down the apple option key while pressing the ‘take picture’ button, there will be no countdown and your picture will be taken instantly. Useful if you need to take a picture fast!
As mentioned above, the flash is a great addition to Photo Booth. However, when you have perfect lighting set up in a room, a flash can often ruin your pictures. Therefore, turning off the flash can be useful at times, and holding down the shift key while taking a picture will do this. If you wish to take an instant picture without a flash then just hold down both the option and shift keys at the same time while taking a picture.