I would like share this useful information to you guys ..so some one helped 
The Android mobile operating system has an impressive set of keyboard shortcuts to help you fly through your phone without digging through the menus. A couple of quick key presses are all you need for most common tasks.
Android Keyboard Shortcuts: Scrolling
• Spacebar: Page down in any Web page/document view
• Shift + Spacebar: Page up in any Web page/document view
Android Keyboard Shortcuts: Typing
• Alt + Spacebar: Insert a special character
• Shift + Del: Delete the character to the right of the cursor
• Alt + Del: Delete an entire line
• Shift + Shift (press it twice): Activate caps-lock; press shift once more to exit
• Alt + Trackball-Left: Move cursor to beginning of line
• Alt + Trackball-Right: Move cursor to end of line
• Alt + Trackball-Up: Move cursor to top of page
• Alt + Trackball-Down: Move cursor to bottom of page
• Shift + Trackball-Left/Right: Highlight text for cutting or copying
• Menu + X: Cut text (will cut all text on-screen unless specific characters are highlighted)
• Menu + C: Copy text to clipboard (will copy all text on-screen unless specific characters are highlighted)
• Menu + V: Paste text from clipboard
• Menu + A: Select all text in the current field
Android Keyboard Shortcuts: Browsing
• Menu + I: Zoom in
• Menu + O: Zoom out
• Menu + J: Go back a page
• Menu + K: Go forward a page
• Menu + R: Refresh current page
• Menu + F: Find on page
• Menu + B: Open bookmarks
• Menu + S: Open social network sharing menu
• Menu + H: View browsing history
• Menu + S: Open browser settings
Android Keyboard Shortcuts: Gmail
• F: Forward current message (works only while inside the message)
• R: Reply to current message (works only while inside the message)
• A: Reply-all to current message (works only while inside the message)
• Y: Archive message (works from within message or while on main inbox list)
• Menu + U: Refresh inbox
• Menu + C: Compose new e-mail
• Enter: Open an e-mail (from the main inbox list)
• Alt + Trackball-Up: Jump to top of inbox
• Alt + Trackball-Down: Jump to bottom of inbox
Android Keyboard Shortcuts: Apps
• Search + B: Open browser
• Search + C: Open contacts
• Search + E: Open e-mail
• Search + G: Open Gmail
• Search + I: Open calendar
• Search + M: Open maps
• Search + P: Open music
• Search + S: Open text messaging
• Search + Y: Open YouTube
You can also customize the keyboard shortcuts for applications: Just go into "Applications" off the main system settings menu, then select "Quick Launch." From there, you can change any of the above app-controlling hotkeys and add in your own.
The Android mobile operating system has an impressive set of keyboard shortcuts to help you fly through your phone without digging through the menus. A couple of quick key presses are all you need for most common tasks.
Android Keyboard Shortcuts: Scrolling
• Spacebar: Page down in any Web page/document view
• Shift + Spacebar: Page up in any Web page/document view
Android Keyboard Shortcuts: Typing
• Alt + Spacebar: Insert a special character
• Shift + Del: Delete the character to the right of the cursor
• Alt + Del: Delete an entire line
• Shift + Shift (press it twice): Activate caps-lock; press shift once more to exit
• Alt + Trackball-Left: Move cursor to beginning of line
• Alt + Trackball-Right: Move cursor to end of line
• Alt + Trackball-Up: Move cursor to top of page
• Alt + Trackball-Down: Move cursor to bottom of page
• Shift + Trackball-Left/Right: Highlight text for cutting or copying
• Menu + X: Cut text (will cut all text on-screen unless specific characters are highlighted)
• Menu + C: Copy text to clipboard (will copy all text on-screen unless specific characters are highlighted)
• Menu + V: Paste text from clipboard
• Menu + A: Select all text in the current field
Android Keyboard Shortcuts: Browsing
• Menu + I: Zoom in
• Menu + O: Zoom out
• Menu + J: Go back a page
• Menu + K: Go forward a page
• Menu + R: Refresh current page
• Menu + F: Find on page
• Menu + B: Open bookmarks
• Menu + S: Open social network sharing menu
• Menu + H: View browsing history
• Menu + S: Open browser settings
Android Keyboard Shortcuts: Gmail
• F: Forward current message (works only while inside the message)
• R: Reply to current message (works only while inside the message)
• A: Reply-all to current message (works only while inside the message)
• Y: Archive message (works from within message or while on main inbox list)
• Menu + U: Refresh inbox
• Menu + C: Compose new e-mail
• Enter: Open an e-mail (from the main inbox list)
• Alt + Trackball-Up: Jump to top of inbox
• Alt + Trackball-Down: Jump to bottom of inbox
Android Keyboard Shortcuts: Apps
• Search + B: Open browser
• Search + C: Open contacts
• Search + E: Open e-mail
• Search + G: Open Gmail
• Search + I: Open calendar
• Search + M: Open maps
• Search + P: Open music
• Search + S: Open text messaging
• Search + Y: Open YouTube
You can also customize the keyboard shortcuts for applications: Just go into "Applications" off the main system settings menu, then select "Quick Launch." From there, you can change any of the above app-controlling hotkeys and add in your own.