Select a photo from your gallery (this effect works best on darker or nighttime photos). Tap the icon (the three stars).

If you're diving into actual flash photography, several key features and modes help you control the light:

You can save the filter from Stories and then apply it to your Reels, adding a quick 0.1-second cut for a "flicker" effect. Photography & Camera Flash Features

Search for or "Flash Film Style" and select the filter.

The "Flash" feature depends on whether you're looking for the viral social media effect or actual photography techniques. Currently, the most trending "Flash" feature is a that uses AI to mimic a retro, film-style aesthetic . Viral Instagram "Flash" Filter