cb6bfdcf_les___Explore_MIT_App_Inventor__Purpose_of_Component
[Component Type] Button [Palette Group] Basic [What you'll name it] ButtonSubmit [Settings of Component] Set the Text to "Submit" Set the width property to Fill Parent [Purpose of Component] 
Adds new data to the public fusion table
Pizza Party with Fusion Tables | Explore MIT App Inventor
Purpose of Component