Live View shooting and Modelling Flash

When shooting with wireless Speedlites, especially in a multiple Speedlite flash setup, the modelling flash function can prove incredibly useful. The modelling flash function allows you to check if each Speedlite is firing and view where shadows and highlights are falling. If you are using Live View mode, you will find that pushing the depth-of-field preview button to activate the modelling flash doesn’t work – this is a Live View feature. If you need to use the modelling flash, you will need to first exit Live View and then press the depth-of-field button.
EX Speedlites
Camera settings