Task: I want to use the Polaris Office app to share the Maria Rossi document with my mother, bianca.rossi1967@gmail.com.
Steps:
Go back to the previous page
Click on three line icon
Click on Share option
Click on Send Document
Click on Gmail 
Add email bianca.rossi1967@gmail.com
Click on bianca.rossi1967@gmail.com
Click on Share icon