Here is the post I've been promising you guys for awhile. I had a long weekend, moving sucks. So thats why I couldn't get this post up sooner. Anyways, below is a huge list of shortcuts for most Nokia S60 3rd Edition phones. Some people say that the "silent profile" shortcut doesn't work with some versions of the Nokia N73, it seems to work fine on mine. If you have anymore shortcuts that aren't listed please share.
Generic Shortcuts
1. To get the Task Manager
To close a running application you can press and hold the Menu button
until all the running task can be seen. Then to close an application highlight it and then press the
key
2. To switch to Silent profile
This shortcut is very handy. Press and hold the
( ‘0′ key) until the profile changes to Silent. To switch back to normal, press and hold
again
3. To select multiple items
In file browser, address book, gallery or anywhere, when you need to select multiple items hold edit key
while pressing 
To select many files / items press and hold
then, (while holding down edit
) move
key to the desired direction until the required files are selected.
To remove the selected files /items press 
4. Launching the music player
Press and hold the multimedia key
until the music player shows up
5. Launching the Browser
Press and hold the
0 key until you see the browser window
6. To get the list of last dialed numbers
press the
Call key. Select a number and then again press the
Call key to dial that number
7. To get to the Voice Mail Box
Press and hold the ‘1′ key
. If voice mail box is not defined, it will ask you to define one.
8. Speed dialing
You can set the keys 2-9 for speed dialing. Press and hold the key until it starts dialing. To define speed dials, press and hold an unused number. It will ask you to select a number.
For eg: press and hold the key 2
. If a speed dial is not assigned to this number it will ask you to assign a number for this key. If it is already defined, it will start dialing that number
When working with Text
9. To turn predictive mode on or off
quickly press # key
twice.
10. To insert numbers in character mode
This is a useful shortcut. Press and hold the key until the pressed number appear. For eg: to insert 2 in character mode (normal press will only produce the alphabets associated with it), press and hold the
key until ‘2′ is inserted
11.To switch between the letter and number mode
Press and hold 
12. To insert common punctuations like . ? , etc
Press key 1
repeatedly until you get the desired character
13 To open the special characters window
Press * key
.
14. To insert multiple characters from the special characters window
Pressing
will open the characters window. But if you select a character with the Enter key
, the window will be closed. To insert multiple characters without closing the window, use key 5 
15. Selecting and Copy/Pasting text
Press and hold down the edit key
and move the joystick
in required direction. Press edit key
again to get cut/copy/paste option
In Applications
16. To return to camera from anywhere
If the camera is open and you’re in standby mode or in another application, press and hold the shutter key
until you get the camera application
17. To view the last image in gallery
press
to view the last image in gallery. Press
again to get the gallery view.
18. In Image Editor (Select the image. Then Options -> Edit)
Press
to view the image in full screen. Press
again to return to normal view
Press
and
to rotate the image anti clockwise or clockwise respectively
To zoom in or out, press
or 
19. In Video Editor (Select video -> Options -> Edit -> Cut)
To save the current frame as image, press the edit key 
20. In Browser
To go to the end of the page press 
To go to the beginning of a page press 
To get the bookmarks while browsing press and hold 
Closes the current window (if multiple windows opened) - Press 
To open bookmark, press 
To search for text in the current page, press 
To return to previous page - 
To list all open windows - 
To switch between page overview and zoom mode press 
To go to another page 
To go to start page 
To zoom in and out of the page, use
and
respectively
source: myn73
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