When you open Snapchat, you will see the camera view straightaway, which actually serves as the main screen in Snapchat. Swipe down to view a screen that lets you find friends to add. While on this screen, tap the Settings icon (gear symbol) in the top-right corner to access secret features and hidden settings.
You’ll then want to tap “Manage” under Additional services. While in this section, you can toggle different options. As of December 2015, you can enable filters (go here to learn more) and a travel mode that reduces mobile data usage.
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