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The Floating Action Buttons appear at the bottom of the screen.
The Share button only appears after a successful edit.
Tap on one of the Floating Action buttons to perform the relevant action
Select the Share Floating Action Button if you want to share the edited image.
You can use any of the apps displayed in the chooser to share the edited image. For example:
Only apps installed on your device and that are capable of sharing the image will be displayed in the chooser pop-up.
Tapping the Share Floating Action Button causes an app chooser to pop up.