Effects should be designed with care and thought for everyone on Facebook:
Effects help make photos and videos more shareable. We've learned what makes an effect more likely to be shared and why.
For example: + I want to express who I am, what I'm doing, or how I'm feeling right now. * I want to share about current news, topics or trends. - I want to connect with others and have a conversation. + I want to be funny, silly or something 'other' than myself.
People interact with an effect by using gestures. These gestures can be performed on screen (by touch) or through detection (by moving a facial feature in front of the camera).
These are interactions that people are familiar with on their mobile devices and within Facebook. Changing how these commands work adds confusion and frustration. These screen gestures include:
Interaction instruction text is temporarily overlaid on the camera view to help people understand what they need to do to experience the whole effect.
If you need to create custom interaction instructions, it's best to:
Effect icons represent your effect in the camera and are often the first thing people see of your effect. Learn more about how to create them.