Task: There is an email I received from my friend Amelia Miller that contains the "Queen's Gambit.pdf" file. reply to the mail, saying thank you to her.
Steps:
Scroll up until you find the mail of Amelia Miller that contains the "Queen's Gambit.pdf" file.
Click on the mail from Amelia Miller that contains the "Queen's Gambit.pdf" file.
Click the Reply button at the bottom left corner of the screen.
Type in Thank you.
Click the Send icon at the top-right of the screen.