Android mobile operating system has some keyboard shortcuts to help you use the android phone without going through the menu.
A few quick key combination can facilitate in your android phone to operate.

1. Android Keyboard Shortcuts (Scrolling).
• Space: Page Down on a web page / view the document.
• Shift + Space: Page Up on the web page / view the document.

2. Android Keyboard Shortcuts (Typing).
• Alt + Space: Inserting special characters.
• Shift + Del: Delete the character to the right of the cursor.
• Alt + Del: Deletes the entire line.
• Shift + Shift (press twice): Enable caps-lock, press the shift key again to exit.
• Alt + Trackball-Left: Move cursor to the start line.
• Alt + Trackball-Right: Move cursor to end of line.
• Alt + Trackball-Up: Move cursor to the top of the page.
• Alt + Trackball-Down: Move cursor to the bottom of the page.
• Shift + Trackball-Kiri/Kanan: Highlight text to cut or copy.
• Menu + X: Cut the text (to be cut all the text on the screen except the special characters highlighted).
• Menu + C: Copy text to the clipboard (to copy all the text on the screen except the special characters highlighted).
• Menu + V: Paste text from clipboard.
• Menu + A: Selects all text.

3. Android Keyboard Shortcuts (Browsing).
• Menu + I: Zoom.
• Menu + O: Collapse.
• Menu + A: Back Page.
• Menu + K: Forward a page.
• Menu + R: Refresh the page.
• Menu + F: Searching.
• Menu + B: Bookmark.
• Menu + S: Open the menu sharing social networking
• Menu + H: View the browsing history.
• Menu + S: Browser settings.

4. Android Keyboard Shortcuts (Gmail).
• F: Forward the message.
• R: Reply to a message.
• A: Reply-all messages.
• Y: Archive messages.
• Menu + U: Refresh your inbox.
• Menu + C: Write e-mail.
• Enter: Open the e-mail (from a list of the main inbox).
• Alt + Trackball-Up: Jump to the top of your inbox.
• Alt + Trackball-Down: Jump to the bottom of the inbox.

5. Android Keyboard Shortcuts (Apps).
• Search + B: Open the browser.
• Search + C: Open Contacts.
• Search + E: Open the e-mail.
• Search + G: Open Gmail.
• Find + I: Open the calendar.
• Search + M: Open Map.
• Search + P: Open to music.
• Search + S: Open the text message.
• Search + Y: Go to YouTube.