Evidence of Editing (Sound Effects)

I have edited in a range of sound effects to add to depth to the audio and add sounds I would not be able to record within a shot. I have done this by sourcing external sound effects for the sound effects that I would not be able to record like a static electric sound for my title opening and recording sound to use as sound effects in my film for example recording the sound of footsteps and importing it into my film to ensure there is no silence in the scene which could be uncomfortable for audience and also emphasise an action or movement benefitting my film.