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 UNDO to restore it to your Inbox.
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 (at the upper-right corner of the screen) to select Move to, Change labels, Add star, Mark important, Mute, and Report spam.
While viewing a message, swipe the screen left and right to scroll through all of your messages and use the icons in the header at the top of the screen:
Tap the Gmail icon to return to your Gmail Inbox.
Tap the Delete icon to move the email to the trash folder.
Tap the Unread icon to return the message to an unread state.
Tap the Menu options icon to access Move to, Change labels, Mark important (or not important), Mute, Print, and Report spam.
If you’re viewing a message or another label, tap the Back Key (in the Touch Keys bar) until you return to your Inbox.