While viewing your Inbox:
Swipe the screen up and down to scroll through your list of messages.
Tap the Compose icon (at the bottom-right corner of
the screen) to start a new Gmail message.
Tap the Search icon (in the header at the top of
the screen) to search within the Gmail app.
Swipe a Gmail message off the screen to the left or right to quickly and easily archive the message.
Tap the letter icon (or contact photo) to the left of one or
more messages, then tap the Delete icon (at the top of the screen) to
delete the selected messages.
Tap the letter icon (or contact photo) to the left of one or
more messages, then tap the Menu icon to select Move to,
Change labels, Add star, Mark important, Mute, Report spam, or Report phishing.